【０００１】[0001]
【産業上の利用分野】本発明は、空間伝送技術に係り、
特に、スペクトル拡散通信方式（Spread spectrum comm
unication system）を用いた空間伝送方法及び空間伝送
装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to spatial transmission technology,
In particular, spread spectrum communication method (Spread spectrum comm
The present invention relates to a spatial transmission method and a spatial transmission device using an unication system).
【０００２】[0002]
【従来の技術】光あるいは電波を通信媒体とする空間伝
送方式として、スペクトル拡散通信方式が知られてい
る。このスペクトル拡散通信方式は、送信側装置におい
て、伝送対象となる情報信号と拡散符号（スペクトルを
拡散するための時間関数）との乗算により帯域を広げた
拡散信号を生成し、またこの拡散信号により主搬送波を
変調して拡散変調波を生成し伝送路（空間）に送信する
ものである。他方、受信側装置においては、上記生成し
た拡散変調波の逆拡散と復調を行なった元の情報信号を
復元する。このようにして送信側装置から受信側装置に
情報信号の伝送が行われる。なお、拡散信号を生成する
際には、情報信号の１ビットに対して１周期以上の拡散
符号周期を割り当て、これらを乗算するのが一般的であ
る。2. Description of the Related Art A spread spectrum communication system is known as a space transmission system using light or radio waves as a communication medium. In this spread spectrum communication system, a transmitter device generates a spread signal with a broadened band by multiplying an information signal to be transmitted by a spread code (a time function for spreading the spectrum), and by this spread signal, It modulates a main carrier wave to generate a spread modulated wave and transmits it to a transmission path (space). On the other hand, the receiving side device restores the original information signal obtained by despreading and demodulating the generated spread modulated wave. In this way, the information signal is transmitted from the transmission side device to the reception side device. When a spread signal is generated, it is general that one or more spread code periods are assigned to one bit of the information signal and these are multiplied.
【０００３】[0003]
【発明が解決しようとする課題】ところで、上記スペク
トル拡散方式では、情報符号１ビットに対して拡散符号
系列を１周期以上乗算することから、拡散符号の伝送速
度が情報信号の伝送速度に対して遥かに高速となる。即
ち、送信側装置と受信側装置との間において上記拡散変
調波を高速で伝送されることになる。そのため、送信側
装置および受信側装置を周波数の応答性の高速な素子あ
るいは回路で構成する必要がある。ところがこれは、現
在の技術レベルでは難しいことであり、また実現するた
めには高価な素子や回路が必要になることから、コスト
の点から実現困難であるという問題があった。By the way, in the above-mentioned spread spectrum system, since the information code 1 bit is multiplied by the spreading code sequence for one cycle or more, the transmission rate of the spreading code is different from that of the information signal. It will be much faster. That is, the spread modulated wave is transmitted at high speed between the transmitting side device and the receiving side device. Therefore, it is necessary to configure the transmitting side device and the receiving side device with elements or circuits having a high frequency response. However, this is difficult at the current technical level, and there is a problem that it is difficult to realize from the viewpoint of cost because expensive elements and circuits are required to realize it.
【０００４】本発明は、上記問題点に鑑みて創案された
ものであり、その目的は、スペクトル拡散通信方式によ
る空間伝送を、周波数応答性の低速な素子あるいは回路
を用いて高速に行うことができる空間伝送方法を提供す
ることにある。本発明の他の目的は、この空間伝送方法
を実現するための空間伝送装置を提供することにある。The present invention was conceived in view of the above problems, and an object thereof is to perform space transmission by a spread spectrum communication system at high speed by using a low frequency response element or circuit. It is to provide a space transmission method that can be performed. Another object of the present invention is to provide a space transmission device for realizing this space transmission method.
【０００５】[0005]
【課題を解決するための手段】本発明は、例えば符号分
割多元接続（ＣＤＭＡ）を用いて一つのチャネルに複数
のサブチャネルを割り当てるとともに、各サブチャネル
の相互干渉を抑える方法及びその実現装置を提供する。SUMMARY OF THE INVENTION The present invention provides a method and an apparatus for implementing the method, in which a plurality of subchannels are assigned to one channel by using, for example, code division multiple access (CDMA), and mutual interference between the subchannels is suppressed. provide.
【０００６】即ち、本発明が提供する空間伝送方法は、
スペクトル拡散通信方式を用いて信号の送受信を行う方
法であって、送信側は、直列信号である情報信号をｎ
（自然数）の並列信号に変換するとともに、各並列信号
をそれぞれの相互相関値が最小となる拡散符号で拡散し
てｎの拡散変調波を生成し、これら拡散変調波を同一空
間に同時に送信する。他方、受信側は、前記ｎの拡散変
調波を受信し、受信した各拡散変調波を前記拡散符号を
用いて逆拡散するとともに、逆拡散して得たｎの並列信
号を直列の情報信号に変換する。この方法において、前
記拡散符号は、ｎビットで構成される拡散符号系列を前
記並列信号又は拡散変調波毎に１ビットづつシフトした
（ｎ＋１）ビット直交系列の組であり、且つ各組の末尾
にそれぞれ１を付加したものであることを特徴とする。That is, the spatial transmission method provided by the present invention is
A method of transmitting and receiving a signal using a spread spectrum communication method, in which a transmitting side transmits an information signal which is a serial signal to n
While converting to a (natural number) parallel signal, each parallel signal is spread by a spreading code having a minimum cross-correlation value to generate n spread modulated waves, and these spread modulated waves are simultaneously transmitted to the same space. . On the other hand, the receiving side receives the n spread-modulated waves, despreads each received spread-modulated wave using the spread code, and converts the n parallel signals obtained by despreading into serial information signals. Convert. In this method, the spreading code is a set of (n + 1) -bit orthogonal sequences obtained by shifting a spreading code sequence composed of n bits by 1 bit for each of the parallel signal or the spread modulated wave, and at the end of each set. It is characterized by adding 1 to each.
【０００７】また、本発明が提供する空間伝送装置のう
ち、送信側の装置は、直列の情報信号をｎ（自然数）の
並列信号に変換する直並列変換器と、ｎ個の拡散符号を
出力する符号発生器と、前記拡散符号を用いて前記並列
信号を拡散してｎの拡散変調波を生成するｎ個の拡散部
と、生成されたｎの拡散変調波を同一空間に同時に送信
する送信部とを有し、前記符号発生器は、ｎビットで構
成される拡散符号系列を前記並列信号毎に１ビットづつ
シフトした（ｎ＋１）ビット直交系列の組で且つ各組の
末尾にそれぞれ１を付加したものを出力することを特徴
とする。Further, of the spatial transmission devices provided by the present invention, the device on the transmission side outputs a serial-parallel converter for converting a serial information signal into n (natural number) parallel signals and n spread codes. A code generator for generating, n spreading sections for spreading the parallel signal using the spreading code to generate n spread modulated waves, and transmission for simultaneously transmitting the generated n spread modulated waves to the same space And the code generator is a set of (n + 1) -bit orthogonal sequences obtained by shifting the spread code sequence consisting of n bits by 1 bit for each of the parallel signals, and adding 1 to the end of each set. The feature is that the added one is output.
【０００８】他方、受信側の装置は、同一空間からｎ
（自然数）の拡散変調波を同時に受信する受信部と、受
信した各拡散変調波をｎ個の拡散符号を用いて逆拡散し
てｎの並列信号を生成するｎ個の逆拡散部と、前記ｎの
並列信号を直列の情報信号に変換する並直列変換器とを
有し、前記符号発生器は、ｎビットで構成される拡散符
号系列を前記拡散変調波毎に１ビットづつシフトした
（ｎ＋１）ビット直交系列の組で且つ各組の末尾にそれ
ぞれ１を付加したものを出力することを特徴とする。On the other hand, the device on the receiving side receives n from the same space.
A receiving unit that simultaneously receives (natural number) spread modulated waves; and n despreading units that despread each received spread modulated wave using n spread codes to generate n parallel signals. and a parallel-serial converter for converting n parallel signals into serial information signals, wherein the code generator shifts a spread code sequence composed of n bits by 1 bit for each spread modulated wave (n + 1). ) It is characterized by outputting a set of bit orthogonal sequences and adding 1 to the end of each set.
【０００９】[0009]
【作用】本発明の空間伝送方法および空間伝送装置にお
いては、送信側が直列の情報信号を複数の並列信号に変
換するとともに、各並列信号をそれぞれの相互相関値が
最小となる拡散符号で拡散してｎの拡散変調波を生成し
て同一空間に同時に送信する。他方、受信側では、同一
空間から同時に受信したｎの拡散変調波を前記拡散符号
を用いて逆拡散するとともに、逆拡散して得たｎの並列
信号を直列の情報信号に変換する。In the space transmission method and the space transmission device of the present invention, the transmitting side converts the serial information signal into a plurality of parallel signals, and spreads each parallel signal with a spreading code having a minimum cross-correlation value. Then, n spread modulated waves are generated and transmitted to the same space at the same time. On the other hand, the receiving side despreads n spread modulated waves simultaneously received from the same space using the spreading code, and converts the n parallel signals obtained by despreading into serial information signals.
【００１０】このように直列の情報信号を伝送する１つ
のチャネルに対して複数のサブチャネルを設定すること
で、伝送速度が高まる。一つのチャネルに設定するサブ
チャネル数をｎとすれば、伝送速度はｎ倍となる。従っ
て、比較的動作の低速で周波数応答性の低速な素子や回
路を用いた装置構成でも高速伝送が可能になる。By thus setting a plurality of sub-channels for one channel for transmitting serial information signals, the transmission speed is increased. If the number of sub-channels set in one channel is n, the transmission rate will be n times. Therefore, high-speed transmission is possible even with a device configuration using a device or a circuit that operates at a relatively low speed and has a low frequency response.
【００１１】また、各並列信号、拡散変調波それぞれ乗
算する拡散符号として、ビットシフトされた直交系列の
組を用いることで、サブチャネル間の相互干渉が０とな
って伝送品質の低下を防止することができ、従来の直列
伝送を行う場合と同等な伝送品質が得られる。Further, by using a set of bit-shifted orthogonal sequences as a spreading code for multiplying each parallel signal and each spread modulated wave, mutual interference between sub-channels becomes zero and deterioration of transmission quality is prevented. Therefore, it is possible to obtain the same transmission quality as in the case of performing the conventional serial transmission.
【００１２】[0012]
【実施例】次に、図面を参照して本発明の実施例を詳細
に説明する。図１は、本発明の一実施例に係る空間伝送
装置のうち送信機の構成例を示すブロック図であり、図
２は、受信機の構成例を示すブロック図である。Embodiments of the present invention will now be described in detail with reference to the drawings. 1 is a block diagram showing a configuration example of a transmitter in a spatial transmission device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a configuration example of a receiver.
【００１３】図１を参照すると、送信機１０は、直列の
情報信号１０１を並列信号に変換する直並列変換部１０
２、この変換された各並列信号のスペクトル拡散をそれ
ぞれ行うためのｎ個の拡散部１０３ａ〜１０３ｎ、各拡
散部１０３ａ〜１０３ｎに対して互いに直交する直交系
列の組からなるｎの拡散符号を発生する符号発生器１０
４、拡散部１０３ａ〜１０３ｎにおいて生成された並列
の拡散符号を用いて光信号や電波信号からなる拡散変調
波を生成するｎ個の送信部１０５ａ〜１０５ｎを備えて
いる。Referring to FIG. 1, the transmitter 10 includes a serial-parallel converter 10 for converting a serial information signal 101 into a parallel signal.
2, n spreading units 103a to 103n for respectively performing spectrum spreading on the converted parallel signals, and n spreading codes made up of a set of orthogonal sequences orthogonal to each spreading unit 103a to 103n are generated. Code generator 10
4. n transmitters 105a to 105n for generating spread modulated waves composed of optical signals and radio signals using the parallel spread codes generated in the spreaders 103a to 103n.
【００１４】図２を参照すると、受信機２０は、空間中
を伝播してきた拡散変調波を受信するための受信部２０
２、受信した拡散変調波を逆拡散してｎの並列信号を生
成する逆拡散部２０３ａ〜２０３ｎ、送信部と同様の拡
散符号を発生するための符号発生器２０６、上記並列信
号を直列の情報信号に変換する並直列変換部２０４を備
えている。Referring to FIG. 2, the receiver 20 includes a receiver 20 for receiving the spread modulated wave propagating in space.
2. Despreading units 203a to 203n that despread the received spread modulated wave to generate n parallel signals, a code generator 206 that generates a spreading code similar to that of the transmission unit, serial information of the parallel signals. The parallel-serial conversion unit 204 for converting into a signal is provided.
【００１５】以上の構成である本実施例の空間伝送装置
では、送信機１０において、端末装置（図示省略）など
の情報機器から送られてきた情報信号１０１が直並列変
換器１０２によってｎの並列信号に変換され、またこれ
ら変換されたｎの並列信号は各拡散部１０３ａ〜１０３
ｎにそれぞれ送られる。各拡散部１０３ａ〜１０３ｎで
は、符号発生器１０４により発生された並列信号毎の拡
散符号と各並列信号１０１とを乗算して拡散変調波１０
６を生成し、各送信部１０５に送る。送信部１０５は、
これら拡散変調波１０６を光信号あるいは電波信号に変
換して同一空間に同時に送信する。In the space transmission apparatus of the present embodiment having the above configuration, in the transmitter 10, the information signal 101 sent from the information equipment such as the terminal device (not shown) is paralleled by the serial-parallel converter 102 into n parallel signals. The converted n parallel signals are converted into signals, and the spreader units 103a to 103
n respectively. In each of the spreading units 103 a to 103 n, the spreading code for each parallel signal generated by the code generator 104 is multiplied by each parallel signal 101 to spread the modulated wave 10.
6 is generated and sent to each transmitting unit 105. The transmission unit 105
These spread modulated waves 106 are converted into an optical signal or a radio wave signal and are simultaneously transmitted to the same space.
【００１６】他方、受信機２０においては、上記のよう
に空間に送信された光信号あるいは電波信号２０１を受
信する。受信された信号２０１は、受信部２０２におい
てｎの拡散変調波に分離復調され、更に対応する逆拡散
部２０３ａ〜２０３ｎによって逆拡散され、並列信号が
生成される。並直列変換器２０４では、これらの並列信
号を直列の情報信号２０５に変換する。変換された情報
信号２０５は、端末装置などの情報処理装置へデータと
して転送される。On the other hand, the receiver 20 receives the optical signal or the radio wave signal 201 transmitted to the space as described above. The received signal 201 is separated and demodulated into n spread modulated waves in the receiving unit 202, and further despread by the corresponding despreading units 203a to 203n to generate parallel signals. The parallel-serial converter 204 converts these parallel signals into a serial information signal 205. The converted information signal 205 is transferred as data to an information processing device such as a terminal device.
【００１７】上記構成において、符号発生器１０４、２
０６は、並列信号が光信号あるいは電波信号２０１とし
て空間中に混在した場合でも、互いに干渉が０となって
受信機２０において、完全に分離できるようにするため
に、互いに直交する直交系列の組を複数の拡散符号を出
力するものであり、これにより並列信号における相互相
関値を最小（０）とすることができる。In the above configuration, the code generators 104, 2
Even if parallel signals are mixed in the space as optical signals or radio signals 201, 06 is a set of orthogonal sequences which are orthogonal to each other so that interference can be zero and the receiver 20 can be completely separated. To output a plurality of spread codes, which can minimize the cross-correlation value in a parallel signal (0).
【００１８】図３に、このような直交系列の組を発生す
るための、符号発生器３０の具体的な構成例を示す。こ
の符号発生器３０は、Ｍ系列を発生するシフトレジスタ
３０１、複数の遅延回路（ＦＦ）３０２ａ〜３０２ｎ、
Ｍ系列の末尾に１を付加する複数の末尾ビット付加回路
３０３ａ〜３０３ｎから構成される。FIG. 3 shows a concrete example of the configuration of the code generator 30 for generating such a set of orthogonal sequences. The code generator 30 includes a shift register 301 that generates an M sequence, a plurality of delay circuits (FF) 302a to 302n,
It is composed of a plurality of tail bit adding circuits 303a to 303n that add 1 to the end of the M sequence.
【００１９】また図４に、上記の動作によって直交系列
が生成される過程を示す。ここで、シフトレジスタ３０
１は、ｎビット（ｘ1 、ｘ2 、…、ｘn-1 、ｘn ）から
構成されるＭ系列Ｍ１を生成する。そしてこのＭ系列Ｍ
１を遅延回路３０２ａ〜３０２ｎを順次通すことによ
り、Ｍ系列を１チップ（拡散符号を構成する各ビット）
づつシフトさせ、即ちＭ系列を０ビットからｎビットま
でシフトした組（Ｍ１、Ｍ２、…、Ｍｎ）を生成する。FIG. 4 shows a process in which an orthogonal sequence is generated by the above operation. Here, the shift register 30
1 generates an M sequence M1 composed of n bits (x1, x2, ..., Xn-1, xn). And this M series M
1 is sequentially passed through the delay circuits 302a to 302n so that the M sequence is 1 chip (each bit constituting the spread code).
.., Mn) in which the M sequence is shifted from 0 bits to n bits.
【００２０】また、末尾ビット付加回路３０３ａ〜３０
３ｎは、これらＭ系列の符号の末尾のビットに１を付加
し、直交系列の組（Ｏ１、Ｏ２、…、Ｏｎ）を生成す
る。これらｎ個の直交系列は、送信機１０の拡散部１０
３ａ〜１０３ｎ、並びに受信機２０の逆拡散部２０３ａ
〜２０３ｎに。それぞれ割り当てられる。The tail bit adding circuits 303a to 30 are also provided.
3n adds 1 to the last bit of the code of these M sequences to generate a set of orthogonal sequences (O1, O2, ..., On). These n orthogonal sequences are transmitted to the spreading unit 10 of the transmitter 10.
3a to 103n, and the despreading unit 203a of the receiver 20.
To ~ 203n. Each is assigned.
【００２１】[0021]
【発明の効果】以上の説明から明らかなように、本発明
では、送信側では直列の情報信号を例えば符号分割多重
接続を用いて並列信号に変換し、各並列信号をそれぞれ
の相互相関値が最小となる拡散符号で拡散して得たｎの
拡散変調波を同一空間に同時に送信するとともに、受信
側では、同一空間から同時に受信したｎの拡散変調波を
上記拡散符号を用いて逆拡散し、これにより得たｎの並
列信号を直列の情報信号に変換するようにしたので、周
波数応答性の低速な素子あるいは回路を用いてスペクト
ル拡散通信方式による空間伝送を高速に行うことが可能
になる効果がある。As is apparent from the above description, in the present invention, the transmitting side converts a serial information signal into a parallel signal by using, for example, code division multiplex connection, and each parallel signal has a cross-correlation value of While simultaneously transmitting n spread modulated waves obtained by spreading with the minimum spread code to the same space, the receiving side despreads n spread modulated waves received simultaneously from the same space using the above spread code. Since the n parallel signals thus obtained are converted into serial information signals, it is possible to perform high-speed spatial transmission by the spread spectrum communication system by using a low frequency response element or circuit. effective.
【００２２】また、空間伝送装置を構成する符号発生器
として、互いに直交する拡散符号を出力するものを用い
たので、複数のサブチャネル間の相互干渉が０となって
伝送品質の低下防止が図れる効果がある。Further, since a code generator that outputs orthogonal spreading codes is used as the code generator that constitutes the spatial transmission device, mutual interference between a plurality of sub-channels becomes zero and transmission quality deterioration can be prevented. effective.
【図１】本発明の一実施例に係る空間伝送装置の送信機
のブロック図。FIG. 1 is a block diagram of a transmitter of a spatial transmission device according to an embodiment of the present invention.
【図２】本発明の一実施例に係る空間伝送装置の受信機
のブロック図。FIG. 2 is a block diagram of a receiver of a space transmission device according to an embodiment of the present invention.
【図３】本実施例の送信機及び受信機で使用する符号発
生器の一例のブロック図。FIG. 3 is a block diagram of an example of a code generator used in the transmitter and the receiver of this embodiment.
【図４】上記符号生成器における直交系列の生成過程の
一例の説明図。FIG. 4 is an explanatory diagram of an example of a process of generating an orthogonal sequence in the code generator.
１０２ 直並変換部 １０３ａ〜１０３ｎ 拡散部 １０４，２０６ 符号発生器 １０５ａ〜１０５ｎ 送信部 ２０２ 受信部 ２０３ａ〜２０３ｎ 逆拡散部 ２０４ 並直列変換部 ３０１ シフトレジスタ ３０２ａ〜３０２ｎ 遅延回路（ＦＦ） ３０３ａ〜３０３ｎ 末尾ビット付加回路 102 serial-parallel conversion unit 103a-103n spreading unit 104, 206 code generator 105a-105n transmission unit 202 reception unit 203a-203n despreading unit 204 parallel-serial conversion unit 301 shift register 302a-302n delay circuit (FF) 303a-303n tail end Bit addition circuit
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｈ０４Ｂ 10/105 10/10 10/22─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl.6 Identification code Internal reference number FI technical display area H04B 10/105 10/10 10/22
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6051524AJPH07264098A (en) | 1994-03-23 | 1994-03-23 | Method and device for spatial transmission |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6051524AJPH07264098A (en) | 1994-03-23 | 1994-03-23 | Method and device for spatial transmission |
| Publication Number | Publication Date |
|---|---|
| JPH07264098Atrue JPH07264098A (en) | 1995-10-13 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6051524APendingJPH07264098A (en) | 1994-03-23 | 1994-03-23 | Method and device for spatial transmission |
| Country | Link |
|---|---|
| JP (1) | JPH07264098A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002517941A (en)* | 1998-06-01 | 2002-06-18 | タンティビ・コミュニケーションズ・インコーポレーテッド | High-speed acquisition of traffic channels to obtain high-speed variable data transfer rates |
| JP2002374209A (en)* | 2001-06-18 | 2002-12-26 | Oki Electric Ind Co Ltd | Multiplex optical transmission method and multiplex optical transmission system |
| JP2006279747A (en)* | 2005-03-30 | 2006-10-12 | Casio Comput Co Ltd | Optical transmitter, optical receiver, and optical communication system |
| US7496072B2 (en) | 1997-12-17 | 2009-02-24 | Interdigital Technology Corporation | System and method for controlling signal strength over a reverse link of a CDMA wireless communication system |
| US9014118B2 (en) | 2001-06-13 | 2015-04-21 | Intel Corporation | Signaling for wireless communications |
| US9042400B2 (en) | 1997-12-17 | 2015-05-26 | Intel Corporation | Multi-detection of heartbeat to reduce error probability |
| US9225395B2 (en) | 2000-12-01 | 2015-12-29 | Intel Corporation | Antenna control system and method |
| US9247510B2 (en) | 2001-02-01 | 2016-01-26 | Intel Corporation | Use of correlation combination to achieve channel detection |
| US9301274B2 (en) | 2000-02-07 | 2016-03-29 | Intel Corporation | Minimal maintenance link to support synchronization |
| US9525923B2 (en) | 1997-12-17 | 2016-12-20 | Intel Corporation | Multi-detection of heartbeat to reduce error probability |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9525923B2 (en) | 1997-12-17 | 2016-12-20 | Intel Corporation | Multi-detection of heartbeat to reduce error probability |
| US9042400B2 (en) | 1997-12-17 | 2015-05-26 | Intel Corporation | Multi-detection of heartbeat to reduce error probability |
| US7496072B2 (en) | 1997-12-17 | 2009-02-24 | Interdigital Technology Corporation | System and method for controlling signal strength over a reverse link of a CDMA wireless communication system |
| JP2002517941A (en)* | 1998-06-01 | 2002-06-18 | タンティビ・コミュニケーションズ・インコーポレーテッド | High-speed acquisition of traffic channels to obtain high-speed variable data transfer rates |
| JP2008079327A (en)* | 1998-06-01 | 2008-04-03 | Tantivy Communications Inc | Fast acquisition of traffic channels for high speed variable data transfer rates |
| US7602749B2 (en) | 1998-06-01 | 2009-10-13 | Interdigital Corporation | Fast acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system |
| US9307532B2 (en) | 1998-06-01 | 2016-04-05 | Intel Corporation | Signaling for wireless communications |
| US9301274B2 (en) | 2000-02-07 | 2016-03-29 | Intel Corporation | Minimal maintenance link to support synchronization |
| US9807714B2 (en) | 2000-02-07 | 2017-10-31 | Intel Corporation | Minimal maintenance link to support synchronization |
| US9225395B2 (en) | 2000-12-01 | 2015-12-29 | Intel Corporation | Antenna control system and method |
| US9775115B2 (en) | 2000-12-01 | 2017-09-26 | Intel Corporation | Antenna control system and method |
| US9924468B2 (en) | 2000-12-01 | 2018-03-20 | Intel Corporation | Antenna control system and method |
| US9247510B2 (en) | 2001-02-01 | 2016-01-26 | Intel Corporation | Use of correlation combination to achieve channel detection |
| US9014118B2 (en) | 2001-06-13 | 2015-04-21 | Intel Corporation | Signaling for wireless communications |
| JP2002374209A (en)* | 2001-06-18 | 2002-12-26 | Oki Electric Ind Co Ltd | Multiplex optical transmission method and multiplex optical transmission system |
| JP2006279747A (en)* | 2005-03-30 | 2006-10-12 | Casio Comput Co Ltd | Optical transmitter, optical receiver, and optical communication system |
| Publication | Publication Date | Title |
|---|---|---|
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