JPH0993220A - Receiver for spread spectrum communication - Google Patents

Receiver for spread spectrum communication

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Publication number
JPH0993220A
JPH0993220A JP4963096A JP4963096A JPH0993220A JP H0993220 A JPH0993220 A JP H0993220A JP 4963096 A JP4963096 A JP 4963096A JP 4963096 A JP4963096 A JP 4963096A JP H0993220 A JPH0993220 A JP H0993220A
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circuit
output
plurality
despreading
signal
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JP3208650B2 (en
Inventor
Eisuke Kudo
Shigeaki Ogose
栄亮 工藤
重章 生越
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Nippon Telegr & Teleph Corp <Ntt>
日本電信電話株式会社
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Priority to JP4963096A priority patent/JP3208650B2/en
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Abstract

PROBLEM TO BE SOLVED: To eliminate an interference signal with respect to a reception signal from a radio station having a lowest information transmission speed since the output signal of an inverse spread circuit corresponding to a time by one symbol at a lowest information transmission speed is inputted by an interference elimination circuit. SOLUTION: A transmission signal from a radio station is inputted to an antenna 2-1, its output is inputted to a receiver 2-2, it is subjected to an inverse spread by each spread code corresponding to radio stations of (Na1 + Na2 )-sets, output of Na1 -sets of inverse spread circuits 2-3 are connected to a delay circuit TC 2-5. Furthermore, the signal is delayed by a time difference between a preceding wave and a delay wave generated in a radio block, and output of Na2 -sets of inverse spread circuits 2-4 are connected to a delay circuit TS 2-6. The signal is delayed by one information symbol of an information transmission speed a2 and outputs of Na2 -sets of the delay circuits TS 2-6 and Na2 -sets of the inverse spread circuits TS 2-4 are connected to the delay circuit TC. Furthermore, the signal is delayed by a time difference of a preceding wave and a delay wave generated in the radio block to eliminate and interference signal.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は直接拡散スペクトラム拡散通信を行う無線局の受信装置に関し、特に複数の逆拡散回路を備えて、干渉信号を除去する受信装置に関する。 Relates receiver of the radio station performing the present invention is directly spread spread spectrum communication BACKGROUND OF THE INVENTION, especially comprising a plurality of despreading circuits, a receiving apparatus for removing interference signals.

【0002】 [0002]

【従来の技術】図5は従来の技術の例を示す。 BACKGROUND ART FIG. 5 shows an example of the prior art. 同図において、5−1はアンテナ、5−2は受信機、5−3は逆拡散回路、5−4は干渉除去回路、5−5は復調回路である。 In the figure, 5-1 antenna, 5-2 receiver despreading circuits 5-3, 5-4 interference cancellation circuit, 5-5 is a demodulation circuit. 同一の情報伝送速度を有するN局の無線局(Nは2以上の整数)からの送信信号がアンテナ5−1に入力され、アンテナ5−1の出力は受信機5−2に接続され、受信機5−2の出力はn個の逆拡散回路5−3に接続され、N局の無線局に対応したそれぞれの拡散符号で逆拡散が行われ、それらの逆拡散回路5−3の出力は干渉除去回路5−4に接続され、干渉信号が除去され、干渉除去回路5−4の出力は復調回路5−5に接続され、 Radio stations N stations have the same information transmission rate (N is an integer of 2 or greater) transmission signal from the input to the antenna 5-1, the output of the antenna 5-1 is connected to the receiver 5-2, reception the output of the machine 5-2 is connected to the n-number of despreading circuits 5-3, despread with respective spreading codes corresponding to the radio station of the n stations is performed, outputs of the despreading circuit 5-3 is connected to the interference removing circuit 5-4, the interference signal is removed, the output of the interference removing circuit 5-4 is connected to the demodulation circuit 5-5,
復調され、復調データが出力される。 Demodulated, the demodulated data is output.

【0003】 [0003]

【発明が解決しようとする課題】しかしながら、上記従来の技術では、同一の情報伝送速度を有する無線局間の信号について干渉除去を行うため、複数の情報伝送速度を有する無線局と通信を行う場合には適用できないという欠点があった。 However [0005] In the above prior art, for performing interference cancellation for the signal between the radio stations having the same information transmission rate, when communicating with the radio station having a plurality of information transmission rate there is a drawback that it can not be applied to the.

【0004】本発明は異なる伝送速度の無線局との通信に適用可能で干渉信号除去機能を有するスペクトラム拡散通信用受信装置を提供することを目的とする。 [0004] The present invention aims to provide a spread spectrum communication receiver having the applicable interference signal removal function for communication with radio stations of different transmission rates.

【0005】 [0005]

【課題を解決するための手段】上記目的を達成するための第1の本発明の特徴は、複数の情報伝送速度を有する複数の情報信号が各々対応する拡散符号によりスペクトラム拡散されて送信され、該複数の送信信号を同時に受信するスペクトラム拡散通信用受信装置において、前記各拡散符号に対応する複数の逆拡散回路と、最も拡散率が大きい拡散符号に対応する前記逆拡散回路以外の前記各逆拡散回路の出力に接続される複数の遅延回路と、前記各逆拡散回路と前記各遅延回路の各々の出力に接続される干渉除去回路とを有するスペクトラム拡散通信用受信装置にある。 Features of the first invention of the SUMMARY OF] To achieve the above object, is transmitted after being spectrum spread with a spread code a plurality of information signals having a plurality of information transmission rate is corresponding each in spread spectrum communication receiving apparatus for receiving a transmission signal of the plurality of simultaneously each a plurality of despreading circuit corresponding to the spreading code, the most spreading factor corresponds to a larger spreading codes each opposite than the despreading circuit a plurality of delay circuits connected to the output of the spreading circuit is the spread spectrum communication receiver and a interference cancellation circuit connected to each of the outputs of the despreading circuits to the respective delay circuits.

【0006】当該第1の発明によれば、最も低速な情報伝送速度の1シンボル分の時間に対応する逆拡散回路の出力信号が干渉除去回路に入力されるので、最も低速な情報伝送速度を有する無線局からの受信信号に対する干渉信号を除去することができる。 [0006] According to the first invention, since the output signal of the despreading circuit corresponding to the slowest data transmission rate 1 symbol time is input to the interference cancellation circuit, the slowest data transmission rate an interference signal to the received signal from the radio station with can be removed.

【0007】第2の本発明の特徴は、複数の情報伝送速度を有する複数の情報信号が各々対応する拡散符号によりスペクトラム拡散されて送信され、該複数の送信信号を同時に受信するスペクトラム拡散通信用受信装置において、前記各拡散符号に対応する複数の逆拡散回路と、 A second aspect of the present invention is transmitted after being spectrum spread with a spread code a plurality of information signals having a plurality of information transmission rate is corresponding each for spread spectrum communication for receiving a transmission signal of the plurality of simultaneously in the receiving apparatus, a plurality of despreading circuit corresponding to each spreading code,
最も拡散率が大きい拡散符号に対応する逆拡散回路以外の前記各逆拡散回路の出力に接続される複数の第1の遅延回路と、前記各逆拡散回路と前記第1の遅延回路の各々の出力に接続される複数の第2の遅延回路と、前記各逆拡散回路、前記各第1の遅延回路及び前記各第2の遅延回路の各々の出力に接続される干渉除去回路とを有するスペクトラム拡散通信用受信装置にある。 A plurality of first delay circuit, wherein the non-despread circuit is connected to the output of each despreading circuit corresponding to the highest spreading factor is larger spreading code, wherein each of the despreading circuits said first delay circuit spectrum having a plurality of second delay circuits connected to the output, the despreading circuit, and a interference cancellation circuit connected the output of each of the first delay circuit and the respective second delay circuit in spreading communication receiving apparatus.

【0008】当該第2の発明によれば、全ての逆拡散回路に接続された遅延回路が干渉除去回路に接続されるので、最も低速な情報伝送速度を有する無線局からの受信信号に対して、無線区間において発生した干渉信号の遅延波を除去することができる。 According to the second invention, since all of the connected delay circuits despreading circuit is connected to the interference cancellation circuit, the received signal from the radio station with the slowest data transmission rate , it can be removed delayed wave of the interference signal generated in the wireless section.

【0009】第3の本発明の特徴は、複数の情報伝送速度を有する複数の情報信号が各々対応する拡散符号によりスペクトラム拡散されて送信され、該複数の送信信号を同時に受信するスペクトラム拡散通信用受信装置において、前記各拡散符号に対応する複数の逆拡散回路と、 A third aspect of the present invention is transmitted after being spectrum spread with a spread code a plurality of information signals having a plurality of information transmission rate is corresponding each for spread spectrum communication for receiving a transmission signal of the plurality of simultaneously in the receiving apparatus, a plurality of despreading circuit corresponding to each spreading code,
該各逆拡散回路の出力に接続される複数の第3の遅延回路と、最も拡散率が大きい拡散符号に対応する前記逆拡散回路以外の各逆拡散回路の出力及びそれらの前記各第3の遅延回路の出力に各々接続される複数の第4の遅延回路と、前記各逆拡散回路、前記各第3の遅延回路及び前記各第4の遅延回路の各々の出力に接続される干渉除去回路とを有するスペクトラム拡散通信用受信装置にある。 A plurality of third delay circuit connected to the output of the respective despreading circuit, the most spreading factor output and their respective despreading circuit other than the despreading circuit corresponding to the large spreading codes each third a plurality of fourth delay circuit are respectively connected to the output of the delay circuit, the despreading circuits, each third delay circuit and the respective fourth interference canceling circuit connected to each of the outputs of the delay circuit there bets in spread spectrum communication receiver having.

【0010】当該第3の発明によれば、前記第2の発明と同様に、全ての逆拡散回路に接続された遅延回路が干渉除去回路に接続されるので、最も低速な情報伝送速度を有する無線局からの受信信号に対して、無線区間において発生した干渉信号の遅延波を除去することができる。 According to the third invention, similarly to the second invention, since all of the delay circuit connected to the despreading circuit is connected to the interference canceller, having the slowest data transmission speed the received signal from the radio station, it is possible to remove the delay wave of the interference signal generated in the wireless section.

【0011】 [0011]

【発明の実施の形態】図1は本発明の第1の実施の形態例を示す。 Figure 1 DETAILED DESCRIPTION OF THE INVENTION show a first embodiment of the present invention. 情報伝送速度がa1(a1は実数)であるN Information transmission rate a1 (a1 is a real number) is N
a1局(N a1は1以上の整数)の無線局および、情報伝送速度がa2(a2はa2>a1となる実数)であるN a2 a1 stations (N a1 is an integer of 1 or more) and a radio station, information transmission speed is a2 (real number a2 becomes a2> a1) N a2
局(N a2は1以上の整数)の無線局と同時に直接拡散スペクトラム拡散無線通信を行う無線局の受信装置において、a2=2×a1の場合を示す。 Station (N a2 is an integer of 1 or more) in a receiving device of a wireless station for simultaneously direct sequence spread spectrum radio communication with the radio station, showing a case of a2 = 2 × a1. 同図において、1− In the figure, 1
1はアンテナ、1−2は受信機、1−3は逆拡散回路、 1 antenna, 1-2 receiver despreading circuits 1-3,
1−4は遅延回路、1−5は干渉除去回路、1−6は復調回路である。 1-4 delay circuit 1-5 interference cancellation circuit, 1-6 is a demodulation circuit.

【0012】次に、本実施の形態例の動作を説明すると、まず無線局からの送信信号がアンテナ1−1に入力され、アンテナ1−1の出力は受信機1−2に接続され、受信機1−2の出力は(N a1 +N a2 )個の逆拡散回路1−3に接続され、(N a1 +N a2 )局の無線局に対応したそれぞれの拡散符号で逆拡散が行われ、N a2個の逆拡散回路1−3の出力は遅延回路1−4に接続される。 [0012] Next, describing the operation of this embodiment, first, the transmission signal from the radio station is input to the antenna 1-1, the output of the antenna 1-1 is connected to the receiver 1-2, reception the output of machine 2 is connected to the (N a1 + N a2) despread circuits 1-3, despreading is performed for each spreading code corresponding to the radio station (N a1 + N a2) station, N the output of a2 amino despreading circuit 1-3 is connected to the delay circuit 1-4.
そして、情報伝送速度a2の1情報シンボル分だけ遅延され、N a2個の遅延回路1−4と(N a1 +N a2 )個の逆拡散回路1−3の出力は干渉除去回路1−5に接続され、干渉信号が除去される。 Then, it is only 1 information symbol delay information transmission rate a2, connected to the N a2 amino delay circuits 1-4 (N a1 + N a2) pieces output of the despreading circuit 1-3 interference removing circuit 1-5 is, the interference signal is removed. 次いで、干渉除去回路1− Then, the interference removing circuit 1-
5の出力は復調回路1−6に接続され、復調され、復調データが出力される。 The output of the 5 is connected to the demodulation circuit 1-6 is demodulated, the demodulated data is output.

【0013】図2は本発明の第2の実施の形態例を示す。 [0013] Figure 2 shows an embodiment of a second embodiment of the present invention. 情報伝送速度がa1(a1は実数)であるN a1局(N a1は1以上の整数)の無線局および、情報伝送速度がa2(a2はa2>a1となる実数)であるN a2局(N a2は1以上の整数)の無線局と同時に直接拡散スペクトラム拡散無線通信を行う無線局の受信装置において、a2=2×a1の場合を示す。 Information transmission rate a1 (a1 is a real number) is a N a1 stations (N a1 is an integer of 1 or more) radio stations and the information transmission rate is a2 (a2 is a2> a1 to become real number) is a N a2 stations ( N a2 in the receiving device of a wireless station for simultaneously direct sequence spread spectrum radio communication with the radio station of an integer of 1 or more), showing a case of a2 = 2 × a1. 同図において、2− In the figure, 2-
1はアンテナ、2−2は受信機、2−3は情報伝送速度がa1の無線局に対する逆拡散回路、2−4は情報伝送速度がa2の無線局に対する逆拡散回路、2−5は無線区間において発生した遅延波に対応した遅延回路T C 1 is an antenna, the 2-2 receiver despreading circuits to the information transmission rate radio stations a1 2-3, despreading circuit information transmission rate for the radio station of a2 2-4, 2-5 wireless delay circuit T C corresponding to the delayed wave generated in the section,
2−6は情報伝送速度a2の1情報シンボル分に対応した遅延回路T S 、2−7は干渉除去回路、2−6は復調回路である。 2-6 Information delay circuit T S corresponding to one information symbol transmission rate a2, is 2-7 interference cancellation circuit, is 2-6 is the demodulation circuit.

【0014】次に、本実施の形態例の動作を説明すると、まず無線局からの送信信号がアンテナ2−1に入力され、アンテナ2−1の出力は受信機2−2に接続される。 [0014] Next, describing the operation of this embodiment, first, the transmission signal from the radio station is input to the antenna 2-1, the output of the antenna 2-1 is connected to the receiver 2-2. そして、受信機2−2の出力は(N a1 +N a2 )個の逆拡散回路2−3に接続され、(N a1 +N a2 )局の無線局に対応したそれぞれの拡散符号で逆拡散が行われ、N The output of the receiver 2-2 is connected to the (N a1 + N a2) despread circuits 2-3, (N a1 + N a2 ) despreading line in each of the spreading code corresponding to the radio station of the station We, N
a1個の逆拡散回路2−3の出力は遅延回路T C 2−5に接続される。 The output of a1 amino despreading circuit 2-3 is connected to the delay circuit T C 2-5. また無線区間において発生した先行波と遅延波の時間差分だけ遅延され、N a2個の逆拡散回路2− Also it is delayed by the time difference of the preceding wave and the delayed wave generated in the radio interval, N a2 amino despreading circuit 2-
4の出力は遅延回路T S 2−6に接続される。 The output of the 4 is connected to the delay circuit T S 2-6. そして、 And,
情報伝送速度a2の1情報シンボル分だけ遅延され、そのN a2個の遅延回路T S 2−6とN a2個の逆拡散回路T Is only one information symbol delay information transmission rate a2, its N a2 amino delay circuit T S 2-6 and N a2 amino despreading circuit T
S 2−4の出力はそれぞれ遅延回路T Cに接続される。 The output of the S 2-4 is connected to the delay circuit T C respectively.
さらに、無線区間において発生した先行波と遅延波の時間差分だけ遅延され、(N a1 +N a2 )個の逆拡散回路の出力とすべての遅延回路の出力は干渉除去回路2−7に接続され、干渉信号が除去される。 Furthermore, delayed by the time difference of the preceding wave and the delayed wave generated in the radio section is connected to the (N a1 + N a2) pieces of output interference canceller 2-7 output and all of the delay circuits of the despread circuit, interference signal is removed. 次いで、その干渉除去回路2−7の出力は復調回路2−8に接続され、復調され、復調データが出力される。 Then, the output of the interference removing circuit 2-7 is connected to the demodulation circuit 2-8, demodulated, the demodulated data is output. なお、先行波と遅延波の時間差は逆拡散回路の出力信号より推定される。 The time difference between the preceding wave and the delayed wave is estimated from the output signal of the despreading circuit.

【0015】なお、本実施の形態例における、N a2個の逆拡散回路2−4に接続されている遅延回路T C 2−5 [0015] Incidentally, in this embodiment, the delay circuit is connected to the N a2 amino despreading circuit 2-4 T C 2-5
と遅延回路T S 2−6との接続配置を逆にしても同様な効果を得られることは言うまでもない。 A delay circuit T S goes without saying that to obtain a similar effect even if the connection arrangement reversed with 2-6. 即ち、逆拡散回路2−4の出力には遅延回路T C 2−5が接続され、その遅延回路T C 2−5と逆拡散回路T S 2−4の出力にはそれぞれ遅延回路T S 2−6が接続される。 That is, the output of the despreading circuit 2-4 is connected a delay circuit T C 2-5, the delay circuit T C 2-5 despreading circuits T each of the output delay circuit S 2-4 T S 2 -6 it is connected.

【0016】図3は本発明の送信信号列の例を示す。 [0016] Figure 3 shows an example of a transmission signal sequence of the present invention. 同図において、3−1は情報伝送速度a1の無線局の送信信号列、3−2は情報伝送速度a2の無線局の送信信号列を示す。 In the figure, 3-1 transmit signal train radio station information transmission rate a1, 3-2 denotes a transmission signal sequence in the radio station of the information transmission rate a2. 情報伝送速度a1の無線局から1情報シンボル伝送するのに要する時間は、情報伝送速度a2の無線局から2情報シンボル伝送するのに要する時間に相当するため、情報伝送速度a1の無線局からの受信信号を1 The time required from the radio station of the information transmission rate a1 to transmit first information symbol, in order to correspond to the time required from the radio station of the information transmission rate a2 to transmit second information symbol, the data transmission rate a1 from the radio station the received signal 1
情報シンボル復調する場合には、情報伝送速度a2の無線局からの受信信号のうち2情報シンボル分の信号が干渉信号となる。 When information symbol demodulation, 2 information symbols of the signal of the received signal from the radio station of the information transmission rate a2 becomes an interference signal. 本発明では、情報伝送速度a1の無線局の拡散符号に応じた逆拡散回路の出力信号の1情報シンボル分と、情報伝送速度a2の無線局の拡散符号に応じた逆拡散回路の出力信号の2情報シンボル分が干渉除去回路に入力され、干渉信号が除去される。 In the present invention, the information transmission rate a1 and 1 information symbols of the output signal of the despreading circuit in accordance with the spreading code of the radio station, information transmission radio station velocity a2 of the output signals of the despreading circuit in accordance with the spreading code 2 information symbols is input to the interference canceller, the interference signal is removed.

【0017】図4は本発明における干渉除去回路の具体的構成例を示す。 [0017] Figure 4 shows a specific configuration of the interference canceller of the present invention. 同図において、4−1はタップ係数発生器、4−2は乗算器、4−3は加算器を示す。 In the figure, 4-1 tap coefficient generator 4-2 is the multiplier, 4-3 denotes an adder. (N a1 (N a1
+N a2 )個の逆拡散回路1−3の出力と、N a2個の遅延回路の出力が入力される。 The output of the + N a2) despread circuit 1-3, an output of the N a2 amino delay circuit are input. 乗算器3−2においてタップ係数を発生するタップ係数発生器3−1の出力と、前記1−3および1−4の出力が乗算され、乗算器3−2の出力は加算器3−3に入力され、加算器3−3では(N The output of the tap coefficient generator 3-1 for generating the tap coefficient in the multiplier 3-2, an output of the 1-3 and 1-4 are multiplied, the output of the multiplier 3-2 to the adder 3-3 is input, the adder 3-3 (N
a1 +N a2 )個の入力信号を加算した信号を出力し、復調回路4−6に入力される。 a1 + N a2) pieces of the input signal and outputs the signal sum is input to the demodulation circuit 4-6. タップ係数を決定する方法としては、例えば、トレーニング信号を送信し、トレーニング信号と加算器3−3の出力信号との誤差が最小になるように決定する方法(工藤“DS/CDMA無線通信における干渉除去の一検討”、電子情報通信学会春季全国大会、B−392(1994))、拡散符号間の相互相関値より決定する方法がある(R.Lupus & As a method for determining the tap coefficients, for example, it transmits a training signal, interference in method (Kudo "DS / CDMA radio communication error is determined so as to minimize the training signal and the output signal of the adder 3-3 Study of removal ", IEICE spring national Convention, B-392 (1994)), there is a method of determining from the cross-correlation value between spreading code (R.Lupus &
S. S. Verdu, “Linear Multiuse Verdu, "Linear Multiuse
r Detectorsfor Syschronou r Detectorsfor Syschronou
s Code−Division Multiple− s Code-Division Multiple-
Access Channels”, IEEE Tr Access Channels ", IEEE Tr
ansactions on Information ansactions on Information
Theory, vol. Theory, vol. 35, no. 35, no. 1 pp. 1 pp.
123−136(1989))。 123-136 (1989)). また、第2の実施の形態例に対しては本干渉除去回路を適用した場合には、希望信号の先行波と遅延波を合波することができるので、 Further, for the second embodiment in case of applying the present interference cancellation circuit, it is possible to multiplex the preceding wave and the delayed wave of the desired signal,
パスダイバーシティ効果も得られる。 Path diversity effect can be obtained.

【0018】なお、本実施例ではa2=2×a1の場合について示したが、a2>2×a1の場合についても遅延回路を増設し、多数の情報シンボル分の信号を干渉除去回路に入力することによって同様の効果が得られる。 [0018] Incidentally, although this embodiment shows the case of a2 = 2 × a1, a2> also added a delay circuit for the case of 2 × a1, enter the number of information symbols of the signal to the interference cancellation circuit the same effect by can be obtained.
また、各実施例では2種の情報伝送速度を有する無線局の受信装置について示したが、3種以上の場合も同様である。 Although shown for receiving device of a wireless station having two information transmission rate in each of the embodiments, the same applies when three or more kinds.

【0019】 [0019]

【発明の効果】以上説明したように、本発明によれば、 As described in the foregoing, according to the present invention,
最も低速な情報伝送速度の1シンボル分の時間に対応する逆拡散回路の出力信号が干渉除去回路に入力されるので、最も低速な情報伝送速度を有する無線局からの受信信号に対する干渉信号を除去することができる。 Since the output signal of the despreading circuit corresponding to the slowest information transmission 1 symbol time of the velocity is input to the interference removing circuit, remove the interference signal to the received signal from the radio station with the slowest data transmission rate can do. また、 Also,
全ての逆拡散回路に接続された遅延回路の出力信号が干渉除去回路に接続されるので、無線区間において発生した干渉信号の遅延波を除去波も除去することができる。 Since the output signals of all the connected delay circuits despreading circuit is connected to the interference canceller can also be removed remove wave delay wave of the interference signal generated in the wireless section.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の第1の実施の形態例を示す図である。 1 is a diagram showing an embodiment of a first embodiment of the present invention.

【図2】本発明の第2の実施の形態例を示す図である。 2 is a diagram showing an embodiment of a second embodiment of the present invention.

【図3】本発明の送信信号列の例である。 Figure 3 is an example of a transmission signal sequence of the present invention.

【図4】本発明の干渉除去回路の具体的構成例を示す図である。 4 is a diagram showing a specific configuration of the interference canceller of the present invention.

【図5】従来の技術の例を示す図である。 5 is a diagram showing an example of the prior art.

【符号の説明】 DESCRIPTION OF SYMBOLS

1−1 アンテナ 1−2 受信機 1−3 逆拡散回路 1−4 遅延回路 1−5 干渉除去回路 1−6 復調回路 2−1 アンテナ 2−2 受信機 2−3 逆拡散回路 2−4 逆拡散回路 2−5 遅延回路T C 2−6 遅延回路T S 2−7 干渉除去回路 2−8 復調回路 3−1 情報伝送速度a1の無線局の送信信号列 3−2 情報伝送速度a2の無線局の送信信号列 4−1 タップ係数発生器 4−2 乗算器 4−3 加算器 5−1 アンテナ 5−2 受信機 5−3 逆拡散回路 5−4 干渉除去回路 5−5 復調回路 1-1 antenna 1-2 receivers 1-3 despreading circuit 1-4 delay circuit 1-5 interference canceller 1-6 demodulating circuit 2-1 antenna 2-2 receivers 2-3 despreading circuit 2-4 reverse wireless diffusion circuit 2-5 delay circuit T C 2-6 delay circuit T S 2-7 interference canceller 2-8 transmission signal sequence 3-2 information transmission rate a2 of the wireless station demodulator circuit 3-1 information transmission rate a1 transmission signal sequence 4-1 tap coefficient generator 4-2 multipliers 4-3 adders 5-1 antenna 5-2 receivers 5-3 despreading circuit 5-4 interference canceller 5-5 demodulating circuit of the station

Claims (3)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 複数の情報伝送速度を有する複数の情報信号が各々対応する拡散符号によりスペクトラム拡散されて送信され、該複数の送信信号を同時に受信するスペクトラム拡散通信用受信装置において、 前記各拡散符号に対応する複数の逆拡散回路と、 最も拡散率が大きい拡散符号に対応する前記逆拡散回路以外の前記各逆拡散回路の出力に接続される複数の遅延回路と、 前記各逆拡散回路と前記各遅延回路の出力に接続される干渉除去回路とを有することを特徴とする、スペクトラム拡散通信用受信装置。 1. A plurality of information signals having a plurality of information transmission speed is transmitted is spectrum spread by each corresponding spreading code in a spread spectrum communication receiver for receiving a transmission signal of the plurality of simultaneously, each diffusion a plurality of despreading circuit corresponding to the code, and a plurality of delay circuits connected to the output of the despreading circuits other than said despreading circuit corresponding to the highest spreading factor is larger spreading code, and each despreading circuit and having an interference cancellation circuit connected to the output of the respective delay circuits, spread spectrum communications receiver.
  2. 【請求項2】 複数の情報伝送速度を有する複数の情報信号が各々対応する拡散符号によりスペクトラム拡散されて送信され、該複数の送信信号を同時に受信するスペクトラム拡散通信用受信装置において、 前記各拡散符号に対応する複数の逆拡散回路と、 最も拡散率が大きい拡散符号に対応する前記逆拡散回路以外の前記各逆拡散回路の出力に接続される複数の第1 2. A plurality of information signals having a plurality of information transmission speed is transmitted is spectrum spread by each corresponding spreading code in a spread spectrum communication receiver for receiving a transmission signal of the plurality of simultaneously, each diffusion a plurality of despreading circuit corresponding to the code, a plurality of which are connected to the output of the despreading circuits other than said despreading circuit corresponding to the highest spreading factor is larger spreading code first
    の遅延回路と、 前記各逆拡散回路と前記第1の遅延回路の各々の出力に接続される複数の第2の遅延回路と、 前記各逆拡散回路、前記各第1の遅延回路及び前記各第2の遅延回路の各出力に接続される干渉除去回路とを有することを特徴とする、スペクトラム拡散通信用受信装置。 A delay circuit, and a plurality of second delay circuit connected the output of each of said each despreading circuit first delay circuit, the despreading circuits, each first delay circuit and the respective and having an interference cancellation circuit connected to the output of the second delay circuit, a spread spectrum communication receiver.
  3. 【請求項3】 複数の情報伝送速度を有する複数の情報信号が各々対応する拡散符号によりスペクトラム拡散されて送信され、該複数の送信信号を同時に受信するスペクトラム拡散通信用受信装置において、 前記各拡散符号に対応する複数の逆拡散回路と、 該各逆拡散回路の出力に接続される複数の第3の遅延回路と、 最も拡散率が大きい拡散符号に対応する前記逆拡散回路以外の前記各逆拡散回路の出力及びそれらの前記各第3 3. A plurality of information signals having a plurality of information transmission speed is transmitted is spectrum spread by each corresponding spreading code in a spread spectrum communication receiver for receiving a transmission signal of the plurality of simultaneously, each diffusion a plurality of despreading circuit corresponding to the code, and a plurality of third delay circuit connected to the output of the respective despreading circuit, the despreading circuit other than the respective inverse corresponding to the most spreading factor is larger spreading code output and said their spreading circuits each third
    の遅延回路の出力に各々接続される複数の第4の遅延回路と、 前記各逆拡散回路、前記各第3の遅延回路及び前記各第4の遅延回路の各出力に接続される干渉除去回路とを有することを特徴とする、スペクトラム拡散通信用受信装置。 A plurality of fourth delay circuit are respectively connected to the output of the delay circuit of the despreading circuits, each third delay circuit and the interference cancellation circuit connected to each output of each fourth delay circuit and having bets, spread spectrum communications receiver.
JP4963096A 1995-07-13 1996-02-14 Spread spectrum communication receiving apparatus Expired - Fee Related JP3208650B2 (en)

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JP19924695 1995-07-13
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998047246A1 (en) * 1997-04-17 1998-10-22 Ntt Mobile Communications Network Inc. Base station apparatus of mobile communication system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998047246A1 (en) * 1997-04-17 1998-10-22 Ntt Mobile Communications Network Inc. Base station apparatus of mobile communication system
US6782035B1 (en) 1997-04-17 2004-08-24 Ntt Docomo Inc. Base station apparatus of mobile communication system
US7095780B2 (en) 1997-04-17 2006-08-22 Ntt Docomo, Inc. Base station apparatus of mobile communication system
US7443907B2 (en) 1997-04-17 2008-10-28 Ntt Docomo, Inc. Base station apparatus of mobile communication system
US7672357B2 (en) 1997-04-17 2010-03-02 Ntt Docomo, Inc. Base station apparatus of mobile communication system
US7826861B2 (en) 1997-04-17 2010-11-02 Ntt Docomo, Inc. Base station apparatus of mobile communication system
US8005120B2 (en) 1997-04-17 2011-08-23 Ntt Docomo, Inc. Base station apparatus of mobile communication system
CN1510942B (en) 1997-04-17 2011-11-09 Ntt移动通信网株式会社 Transmission method in base station

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