JPH06334575A - Spread spectrum communication reception equipment - Google Patents
Spread spectrum communication reception equipmentInfo
- Publication number
- JPH06334575A JPH06334575A JP5121249A JP12124993A JPH06334575A JP H06334575 A JPH06334575 A JP H06334575A JP 5121249 A JP5121249 A JP 5121249A JP 12124993 A JP12124993 A JP 12124993A JP H06334575 A JPH06334575 A JP H06334575A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- output
- diversity
- spread
- receivers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Radio Transmission System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、送信信号の情報信号に
対して高速な信号速度を有する拡張符号を乗じて広帯域
に拡散された直接拡散スペクトラム拡散送信信号を受信
するスペクトラム拡散通信の受信装置に関し、特に受信
装置で複数のアンテナを備えてダイバーシチ受信を行う
受信装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spread spectrum communication receiver for receiving a direct spread spectrum spread transmission signal spread in a wide band by multiplying an information signal of a transmission signal by an extension code having a high signal speed. In particular, the present invention relates to a receiving device that is provided with a plurality of antennas and performs diversity reception.
【０００２】[0002]
【従来の技術】図６は、従来のスペクトラム拡散通信に
おけるダイバーシチ受信装置の構成例を示すものであ
る。2. Description of the Related Art FIG. 6 shows an example of the structure of a conventional diversity receiver in spread spectrum communication.
【０００３】この受信装置は、二つのアンテナ６１ａ、
６１ｂと、それぞれのアンテナに接続され無線周波数帯
の無線周波数から中間周波数帯またはベースバンド帯に
変換する二つの受信機６２ａ、６２ｂを備え、この二つ
の受信機６２ａ、６２ｂで変換された受信信号のうち受
信機出力の大きい一方の信号を選択する切り替え器６３
と、この切り替え器６３の出力を狭帯域の信号に逆拡散
する逆拡散器６４と、この逆拡散された狭帯域信号を復
調する復調器６５とを備えて構成されている。This receiving device has two antennas 61a,
61b and two receivers 62a and 62b which are connected to the respective antennas and convert from the radio frequency of the radio frequency band to the intermediate frequency band or the base band, and the reception signals converted by the two receivers 62a and 62b A switch 63 for selecting one of the signals with the larger receiver output
And a despreader 64 that despreads the output of the switch 63 into a narrowband signal, and a demodulator 65 that demodulates the despread narrowband signal.
【発明が解決しようとする課題】この図６の受信装置の
受信機出力のスペクトラム例を図７に示す。この図７の
（Ａ）は受信機６２ａの出力のスペクトラムを表し、ま
た（Ｂ）は受信機６２ｂの出力のスペクトラムを表す。
受信機の出力信号中に干渉波が存在する場合には図７に
示すように、干渉波の電力が大きいと、受信機出力の大
きい方が希望波信号が小さくなる場合が生ずる。したが
って、従来の技術では、切り替え器６３で受信機出力の
大きい一方を選択して出力するダイバーシチを行ってい
るので、希望波電力の大きい最適な受信機出力を選択で
きなくなり、ダイバーシチによる伝送特性の改善が得ら
れなくなる問題があった。FIG. 7 shows an example of the spectrum of the receiver output of the receiver of FIG. 7A shows the spectrum of the output of the receiver 62a, and FIG. 7B shows the spectrum of the output of the receiver 62b.
When an interference wave exists in the output signal of the receiver, as shown in FIG. 7, when the power of the interference wave is large, the desired wave signal may be smaller when the output of the receiver is larger. Therefore, in the conventional technique, since the switcher 63 performs diversity to select and output one of the larger receiver outputs, it becomes impossible to select the optimum receiver output having a large desired wave power, and the transmission characteristics of the diversity can be reduced. There was a problem that improvement could not be obtained.
【０００４】本発明は上述の問題を解決するもので、受
信機の出力を逆拡散した出力信号を選択基準としてダイ
バーシチ処理を行うことにより、最適なダイバーシチブ
ランチを選択あるいは最大信号対雑音電力比の合成ダイ
バーシチを行うことができるダイバーシチ特性を改善し
た受信装置を提供することを目的とする。The present invention solves the above-mentioned problem. By performing diversity processing using an output signal obtained by despreading the output of the receiver as a selection reference, the optimum diversity branch is selected or the maximum signal-to-noise power ratio is reduced. An object of the present invention is to provide a receiving apparatus capable of performing combined diversity and having improved diversity characteristics.
【０００５】[0005]
【課題を解決するための手段】本発明の第一の観点は、
情報信号に対して情報信号よりも高速な信号速度を有す
る拡散信号を乗ずることにより送信信号のスペクトラム
が広帯域に拡散された直接拡散スペクトラム拡散通信方
式の受信装置であり、複数のアンテナと、この複数のア
ンテナのそれぞれに接続され、受信信号の周波数帯を無
線周波数帯から中間周波数帯またはベースバンド帯に変
換する複数の受信機と、この受信機の出力のうち信号電
力の大きい一つの受信機の出力を選択して復調するダイ
バーシチ処理手段とを備えたスペクトラム拡散通信受信
装置において、前記複数の受信機のそれぞれの出力に接
続されスペクトラム拡散された受信信号の希望波を狭帯
域信号に変換する逆拡散器を備え、前記ダイバーシチ処
理手段は、この逆拡散器の出力信号のうち信号電力の大
きい一つを選択する選択ダイバーシチ受信手段を含むこ
とを特徴とする。The first aspect of the present invention is to:
This is a direct spread spectrum spread communication type receiver in which the spectrum of a transmission signal is spread over a wide band by multiplying an information signal by a spread signal having a signal speed higher than that of the information signal. Of multiple receivers that are connected to each of the antennas and that convert the frequency band of the received signal from the radio frequency band to the intermediate frequency band or the baseband band, and one of the outputs of this receiver that has a large signal power. In a spread spectrum communication receiver equipped with a diversity processing means for selecting and demodulating an output, an inverse converter for converting a desired wave of a spread spectrum received signal connected to each output of the plurality of receivers into a narrow band signal. A spreader is provided, and the diversity processing means selects one of the output signals of the despreader having a large signal power. Characterized in that it comprises a selection diversity receiver.
【０００６】また第二の観点は、レイク合成器を用いる
装置であり、複数の受信機のそれぞれの出力に設けられ
たスペクトラム拡散された受信信号の希望波を狭帯域信
号に変換する逆拡散器と、この逆拡散器の出力信号に対
して先行波信号と遅延波信号とが信号電力対雑音電力比
が最大になるように合成する複数のレイク合成器とを備
え、ダイバーシチ処理手段は、この複数のレイク合成器
の出力信号のうち信号電力の大きい一つを選択する選択
ダイバーシチ受信手段を含むことを特徴とする。A second aspect is an apparatus using a Rake combiner, which is a despreader for converting a desired wave of a spread spectrum received signal provided at each output of a plurality of receivers into a narrow band signal. And a plurality of rake combiners for combining the output signal of the despreader with the preceding wave signal and the delayed wave signal so that the signal power to noise power ratio becomes maximum, and the diversity processing means It is characterized in that it includes selection diversity receiving means for selecting one of the output signals of the plurality of RAKE combiners, which has a larger signal power.
【０００７】さらに第三の観点は、合成ダイバーシチを
行う装置であり、複数の受信機のそれぞれの出力に接続
されスペクトラム拡散された受信信号の希望波を狭帯域
信号に変換する逆拡散器を備え、この複数の逆拡散器の
出力信号に対して信号電力対雑音電力比が最大になるよ
うにダイバーシチ合成する合成ダイバーシチ受信手段を
含むことを特徴とする。A third aspect is an apparatus for performing composite diversity, which comprises a despreader connected to each output of a plurality of receivers and converting a desired wave of a spread spectrum received signal into a narrow band signal. , And a diversity diversity receiving means for diversity combining the output signals of the plurality of despreaders so that the signal power to noise power ratio is maximized.
【０００８】[0008]
【作用】図８および図９を参照して本発明の作用を説明
する。The operation of the present invention will be described with reference to FIGS.
【０００９】図８に示すように送信局において、情報信
号に対して情報信号よりも高速な信号速度を有する拡散
符号を乗ずることにより送信信号のスペクトラムを広帯
域に拡散させた直接拡散スペクトラム信号を受信局にお
いて狭帯域化した逆拡散出力のスペクトラムは、逆拡散
を行うことにより希望波のスペクトラムは狭帯域に集中
するが、干渉波のスペクトラムは拡がったままとなる。
したがって受信機出力を逆拡散した出力信号を選択基準
とすることにより干渉波が存在する場合においても最適
なダイバーシチブランチを選択することができる。As shown in FIG. 8, the transmitting station receives a direct spread spectrum signal in which the spectrum of the transmission signal is spread over a wide band by multiplying the information signal by a spreading code having a signal speed higher than that of the information signal. As for the spectrum of the despread output that has been narrowed in the station, the spectrum of the desired wave is concentrated in the narrow band by performing despreading, but the spectrum of the interference wave remains wide.
Therefore, by using the output signal obtained by despreading the output of the receiver as the selection reference, the optimum diversity branch can be selected even in the presence of interference waves.
【００１０】さらに、無線区間における伝搬遅延によっ
て遅延波が生じた場合には図９に示すように逆拡散器出
力に遅延波が生ずる。逆拡散器の出力をレイク合成器に
おいて先行波と遅延波が信号対雑音電力が最大となるよ
うに合成し、このレイク合成器の出力信号を選択基準と
することにより、遅延波がある場合においても最適なダ
イバーシチブランチを選択することができる。Furthermore, when a delayed wave is generated due to propagation delay in the wireless section, a delayed wave is generated at the output of the despreader as shown in FIG. In the case where there is a delayed wave, the output of the despreader is combined in the rake combiner so that the preceding wave and the delayed wave have the maximum signal-to-noise power, and the output signal of this rake combiner is used as the selection criterion. Can also select the optimal diversity branch.
【００１１】また、ダイバーシチ合成においても信号電
力対雑音電力比が最大になるように逆拡散器の出力を合
成することによってもダイバーシチ特性を改善できる。Also in diversity combining, the diversity characteristic can be improved by combining the outputs of the despreaders so that the signal power to noise power ratio is maximized.
【００１２】[0012]
【実施例】以下図面を参照して本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１３】（第一実施例）図１は本発明の第一実施例
の受信装置の構成を示すブロック図である。(First Embodiment) FIG. 1 is a block diagram showing the arrangement of a receiving apparatus according to the first embodiment of the present invention.
【００１４】本実施例の受信装置は、情報信号に対して
情報信号よりも高速な信号速度を有する拡散信号を乗ず
ることにより送信信号のスペクトラムが広帯域に拡散さ
れた直接拡散スペクトラム拡散通信方式の受信装置であ
り、アンテナ１１ａ、１１ｂと、このアンテナ１１ａ、
１１ｂのそれぞれに接続され、受信信号の周波数帯を無
線周波数帯から中間周波数帯またはベースバンド帯に変
換する二つの受信機１２ａ、１２ｂと、この受信機の出
力のうち信号電力の大きい一つの受信機の出力を選択し
て復調するダイバーシチ処理手段とを備えたスペクトラ
ム拡散通信受信装置において、本発明の特徴として、複
数の受信機１２ａ、１２ｂのそれぞれの出力にスペクト
ラム拡散された受信信号の希望波を狭帯域信号に変換す
る逆拡散器１３ａ、１３ｂが設けられ、この逆拡散器１
３ａ、１３ｂの出力信号のうち信号電力の大きい一つを
選択して復調する選択ダイバーシチ受信手段として切り
替え器１４とこの切り替え器１４の出力信号を復調する
復調器１５を備える。The receiving apparatus of this embodiment receives a direct spread spectrum spread communication method in which the spectrum of the transmission signal is spread over a wide band by multiplying the information signal by a spread signal having a signal speed higher than that of the information signal. The antennas 11a and 11b and the antennas 11a and 11a.
Two receivers 12a and 12b, which are connected to each of the receivers 11b and convert the frequency band of the received signal from the radio frequency band to the intermediate frequency band or the baseband band, and one of the outputs of the receivers, which has a large signal power In a spread spectrum communication receiving apparatus including a diversity processing means for selecting and demodulating an output of a receiver, a feature of the present invention is that a desired signal of a received signal spread spectrum is output to each output of a plurality of receivers 12a and 12b. Are provided with despreaders 13a and 13b for converting the signal into a narrow band signal.
The selector 14 and the demodulator 15 that demodulates the output signal of the switch 14 are provided as selection diversity receiving means for selecting and demodulating one of the output signals of 3a and 13b having a large signal power.
【００１５】この構成により、図８に示すように、希望
波である信号電力の大きい方の受信機の出力を選択して
最適なダイバーシチブランチを選択することができる。With this configuration, as shown in FIG. 8, it is possible to select the output of the receiver having the larger signal power of the desired wave and select the optimum diversity branch.
【００１６】（第二実施例）図２はレイク合成器を用い
た本発明の第二実施例の構成を示すブロック図である。(Second Embodiment) FIG. 2 is a block diagram showing the configuration of the second embodiment of the present invention using a rake combiner.
【００１７】この第二実施例は、アンテナ２１ａ、２１
ｂと、このアンテナ２１ａ、２１ｂのそれぞれに接続さ
れ、受信信号の周波数帯を無線周波数帯から中間周波数
帯またはベースバンド帯に変換する受信機２２ａ、２３
ｂと、この受信機２２ａ、２３ｂのそれぞれの出力に設
けられたスペクトラム拡散された受信信号の希望波を狭
帯域信号に変換する逆拡散器２３ａ、２３ｂと、この逆
拡散器の出力信号に対して先行波信号と遅延波信号とが
信号電力対雑音電力比が最大になるように合成するレイ
ク合成器２４ａ、２４ｂと、このレイク合成器２４ａ、
２４ｂの出力信号のうち信号電力の大きい一つを選択す
る切り替え器２５と、この切り替え器２５の出力を復調
する復調器１５を備える。In this second embodiment, the antennas 21a and 21a
b and receivers 22a and 23 connected to the antennas 21a and 21b, respectively, for converting the frequency band of the received signal from the radio frequency band to the intermediate frequency band or the base band.
b, despreaders 23a and 23b provided at the respective outputs of the receivers 22a and 23b for converting a desired wave of the spread spectrum received signal into a narrow band signal, and output signals of the despreaders. Rake combiners 24a and 24b for combining the preceding wave signal and the delayed wave signal so that the signal power to noise power ratio becomes maximum, and the rake combiner 24a,
A switch 25 for selecting one of the output signals of 24b having a higher signal power and a demodulator 15 for demodulating the output of the switch 25 are provided.
【００１８】この第二実施例で用いられるレイク合成器
２４は、文献 横山光雄著“スペクトル拡散通信システ
ム”pp.524-538 科学技術出版社 1988 等に記述されて
いるレイク受信方式による合成器である。The rake combiner 24 used in the second embodiment is a rake combiner based on the rake receiving method described in the literature, "Spread spectrum communication system" by Mitsuo Yokoyama, pp.524-538, Science and Technology Publishing Company, 1988. is there.
【００１９】ここで図３にレイク合成器２４の構成を示
して説明する。このレイク合成器２４は、タップ付き遅
延回路３３とその出力とタップ係数発生器３２との出力
を乗算する４つの乗算器３４と、この乗算器３４の出力
を加算する加算器３５を備える。なお、タップ付き遅延
回路３３の上部に逆拡散器２３ａの出力波形を３１とし
て示す。The configuration of the rake combiner 24 will be described with reference to FIG. The rake combiner 24 includes a delay circuit 33 with a tap, four multipliers 34 that multiply the output of the delay circuit 33 with the output of the tap coefficient generator 32, and an adder 35 that adds the outputs of the multiplier 34. The output waveform of the despreader 23a is shown as 31 above the tapped delay circuit 33.
【００２０】逆拡散器２３ａの出力信号はタップ付き遅
延回路３３に入力され、タップ付き遅延回路３３で遅延
された出力は乗算器３４にそれぞれ入力される。タップ
係数発生器３２は加算器３５の出力において信号電力対
雑音電力比が最大になるように設定されたタップ係数を
発生し、乗算器３４に入力される。乗算器３４では前記
係数発生器３２とタップ付き遅延回路３３の出力が乗算
される。その乗算器３４の出力は加算器３５に入力され
てこの加算器３５で全ての入力が加算され切り替え器に
出力される。このレイク合成器２４の出力の信号電力の
大きい方を選択することにより最適なダイバーシチブラ
ンチを選択することができる。The output signal of the despreader 23a is input to the tapped delay circuit 33, and the output delayed by the tapped delay circuit 33 is input to the multiplier 34, respectively. The tap coefficient generator 32 generates a tap coefficient set to maximize the signal power to noise power ratio at the output of the adder 35, and the tap coefficient is input to the multiplier 34. The multiplier 34 multiplies the coefficient generator 32 and the output of the delay circuit 33 with taps. The output of the multiplier 34 is input to the adder 35, and all the inputs are added by the adder 35 and output to the switch. The optimum diversity branch can be selected by selecting the one with the larger signal power of the output of the rake combiner 24.
【００２１】（第三実施例）次に図４に本発明第三実施
例の構成を示す。この第三実施例は第一実施例の切り替
え器１４に代えて信号対雑音電力比を最大になるように
ダイバーシチ合成するダイバーシチ合成器４４を用いる
ものである。(Third Embodiment) FIG. 4 shows the configuration of the third embodiment of the present invention. The third embodiment uses a diversity combiner 44, which performs diversity combining so as to maximize the signal-to-noise power ratio, instead of the switch 14 of the first embodiment.
【００２２】すなわち、アンテナ４１ａ、４１ｂで受信
された信号はそれぞれ受信機４２ａ、４２ｂに入力され
て周波数変換される。受信機４２ａ、４２ｂの出力は逆
拡散器４３ａ、４３ｂに入力されて、希望波の帯域を狭
帯域にする逆拡散が行われる。逆拡散器４３ａ、４３ｂ
の出力はダイバーシチ合成器４４に入力されて信号対雑
音電力比が最大になるようにダイバーシチ合成が行われ
る。このダイバーシチ合成器４４の出力は復調器４５に
入力されて復調される。That is, the signals received by the antennas 41a and 41b are input to the receivers 42a and 42b, respectively, and are frequency-converted. The outputs of the receivers 42a and 42b are input to the despreaders 43a and 43b, and despreading to narrow the band of the desired wave. Despreaders 43a, 43b
Is output to the diversity combiner 44 and diversity combining is performed so that the signal-to-noise power ratio is maximized. The output of the diversity combiner 44 is input to the demodulator 45 and demodulated.
【００２３】ここで図５にダイバーシチ合成器４４の構
成例を示す。このダイバーシチ合成器は二つの逆拡散器
４３の出力が入力されるタップ付き遅延回路５３、５
４、タップ係数発生器５５と、それぞれのタップ付き遅
延回路５３、５４の出力とタップ係数を乗算する乗算器
５６、５７、これらの乗算器の出力を加算する加算器５
８とを備える。FIG. 5 shows a configuration example of the diversity combiner 44. This diversity combiner has tapped delay circuits 53, 5 to which the outputs of the two despreaders 43 are input.
4, a tap coefficient generator 55, multipliers 56 and 57 for multiplying the output of the tapped delay circuits 53 and 54 by the tap coefficient, and an adder 5 for adding the outputs of these multipliers.
8 and.
【００２４】タップ付き遅延回路５３には逆拡散器４３
ａから５１に示す波形が入力され、タップ付き遅延回路
５４には逆拡散器４３ｂから５２に示す波形が入力され
る。タップ係数発生器５５では加算器５８の出力におい
て信号電力対雑音電力比が最大になるように設定された
タップ係数を発生し、乗算器５６、５７に出力する。乗
算器５６、５７ではタップ付き遅延回路５３、５４の出
力とタップ係数発生器５５の出力とが乗算され、加算器
５８はこの乗算器５６、５７の出力を全て加算して合成
ダイバーシチ出力として復調器に出力する。The despreader 43 is included in the tapped delay circuit 53.
The waveforms from a to 51 are input, and the waveforms from the despreaders 43b to 52 are input to the tapped delay circuit 54. The tap coefficient generator 55 generates a tap coefficient set to maximize the signal power to noise power ratio at the output of the adder 58, and outputs it to the multipliers 56, 57. In the multipliers 56 and 57, the outputs of the tapped delay circuits 53 and 54 and the output of the tap coefficient generator 55 are multiplied, and the adder 58 adds all the outputs of the multipliers 56 and 57 and demodulates as a combined diversity output. Output to a container.
【００２５】なお、上記第一実施例ないし第三実施例で
はアンテナが２本の場合について説明したが、３本以上
ある場合でも同様の効果を実現できる。In the above first to third embodiments, the case where the number of antennas is two has been described, but the same effect can be realized even when there are three or more antennas.
【００２６】[0026]
【発明の効果】以上説明したように、逆拡散器出力を選
択基準とすることにより、信号電力の大きい最適なダイ
バーシチブランチを選択することができ、ダイバーシチ
受信特性を従来のものに比べて改善することができる。As described above, by using the output of the despreader as the selection reference, it is possible to select the optimum diversity branch having a large signal power, and improve the diversity reception characteristic as compared with the conventional one. be able to.
【００２７】また、干渉波のほかに伝搬遅延による遅延
波が存在する場合においても、逆拡散出力をレイク合成
し、そのレイク合成後の出力信号を選択基準とすること
により最適なダイバーシチブランチを選択して受信特性
を改善することができる。Further, even when there is a delay wave due to propagation delay in addition to the interference wave, the despread output is RAKE-combined and the output signal after the RAKE-combining is used as a selection reference to select the optimum diversity branch. The reception characteristic can be improved.
【００２８】さらに複数の逆拡散器の出力波形を信号電
力対雑音電力比が最大になるように最大比合成ダイーバ
シチを行うことができるため、選択ダイバーシチより改
善された特性を得ることもできる。Further, since maximum ratio combining diversity can be performed on the output waveforms of a plurality of despreaders so that the signal power to noise power ratio is maximized, it is possible to obtain characteristics improved over the selection diversity.
【図１】本発明第一実施例の構成を示すブロック図。FIG. 1 is a block diagram showing the configuration of a first embodiment of the present invention.
【図２】本発明第二実施例の構成を示すブロック図。FIG. 2 is a block diagram showing the configuration of a second embodiment of the present invention.
【図３】本発明第二実施例のレイク合成器の構成を示す
図。FIG. 3 is a diagram showing a configuration of a Rake combiner according to a second embodiment of the present invention.
【図４】本発明第三実施例の構成を示す図。FIG. 4 is a diagram showing the configuration of a third embodiment of the present invention.
【図５】本発明第三実施例のダイバーシチ合成器の構成
を示す図。FIG. 5 is a diagram showing a configuration of a diversity combiner according to a third embodiment of the present invention.
【図６】従来の受信装置を説明する図。FIG. 6 is a diagram illustrating a conventional receiving device.
【図７】従来の受信装置の受信機出力のスペクトラムの
例を示す図。FIG. 7 is a diagram showing an example of a spectrum of a receiver output of a conventional receiving device.
【図８】逆拡散器出力のスペクトラムの例を示す図。FIG. 8 is a diagram showing an example of a spectrum of an output of a despreader.
【図９】逆拡散器出力の時間波形例を示すデータ。FIG. 9 is data showing an example of a time waveform of the output of the despreader.
１１、２１、４１、６１ アンテナ １２、２２、４２、６２ 受信機 １３、２３、４３、６４ 逆拡散器 １４、２５、６３ 切り替え器 １５、２６、４５、６５ 復調器 ２４ レイク合成器 ３２、５５ タップ係数発生器 ３３、５３、５４ タップ付き遅延回路 ３４、５６、５７ 乗算器 ３５、５８ 加算器 ４４ ダイバーシチ合成器 11, 21, 41, 61 Antenna 12, 22, 42, 62 Receiver 13, 23, 43, 64 Despreader 14, 25, 63 Switcher 15, 26, 45, 65 Demodulator 24 Rake combiner 32, 55 Tap coefficient generator 33, 53, 54 Delay circuit with tap 34, 56, 57 Multiplier 35, 58 Adder 44 Diversity combiner
Claims (3)
信号速度を有する拡散信号を乗ずることにより送信信号
のスペクトラムを広帯域に拡散した直接拡散スペクトラ
ム拡散通信方式の受信装置であり、 複数のアンテナと、 この複数のアンテナのそれぞれに接続され、受信信号の
周波数帯を無線周波数帯から中間周波数帯またはベース
バンド帯に変換する複数の受信機と、 この受信機の出力のうち信号電力の大きい一つの受信機
の出力を選択して復調するダイバーシチ処理手段とを備
えたスペクトラム拡散通信受信装置において、 前記複数の受信機のそれぞれの出力に接続されスペクト
ラム拡散された受信信号の希望波を狭帯域信号に変換す
る逆拡散器を備え、 前記ダイバーシチ処理手段は、この逆拡散器の出力信号
のうち信号電力の大きい一つを選択する選択ダイバーシ
チ受信手段を含むことを特徴とするスペクトラム拡散通
信受信装置。1. A direct-spread-spectrum spread spectrum communication receiver in which a spectrum of a transmission signal is spread over a wide band by multiplying an information signal by a spread signal having a signal speed higher than that of the information signal, and a plurality of antennas. And a plurality of receivers connected to each of the plurality of antennas for converting the frequency band of the received signal from the radio frequency band to the intermediate frequency band or the baseband band, and one of the outputs of the receivers having the largest signal power. In a spread spectrum communication receiving device having a diversity processing means for selecting and demodulating the output of one receiver, a desired wave of a spread spectrum received signal connected to each output of the plurality of receivers is a narrow band signal. The diversity processing means includes a despreader for converting into Spread spectrum communication receiver apparatus which comprises a selective diversity receiving means for selecting one.
信号速度を有する拡散信号を乗ずることにより送信信号
のスペクトラムを広帯域に拡散した直接拡散スペクトラ
ム拡散通信方式の受信装置であり、 複数のアンテナと、 この複数のアンテナのそれぞれに接続され、受信信号の
周波数帯を無線周波数帯から中間周波数帯またはベース
バンド帯に変換する複数の受信機と、 この受信機の出力のうち信号電力の大きい一つの受信機
の出力を選択して復調するダイバーシチ処理手段とを備
えたスペクトラム拡散通信受信装置において、 前記複数の受信機のそれぞれの出力に接続されスペクト
ラム拡散された受信信号の希望波を狭帯域信号に変換す
る逆拡散器と、 この逆拡散器の出力信号に対して先行波信号と遅延波信
号とが信号電力対雑音電力比が最大になるように合成す
る複数のレイク合成器とを備え、 前記ダイバーシチ処理手段は、前記複数のレイク合成器
の出力信号のうち信号電力の大きい一つを選択する選択
ダイバーシチ受信手段を含むことを特徴とするスペクト
ラム拡散通信受信装置。2. A direct-spread-spectrum spread spectrum communication receiver in which a spectrum of a transmission signal is spread in a wide band by multiplying an information signal by a spread signal having a signal speed higher than that of the information signal, and a plurality of antennas are provided. And a plurality of receivers connected to each of the plurality of antennas for converting the frequency band of the received signal from the radio frequency band to the intermediate frequency band or the baseband band, and one of the outputs of the receivers having the largest signal power. In a spread spectrum communication receiving device having a diversity processing means for selecting and demodulating the output of one receiver, a desired wave of a spread spectrum received signal connected to each output of the plurality of receivers is a narrow band signal. The despreader for converting to the despreader and the preceding wave signal and the delayed wave signal with respect to the output signal of this despreader are And a plurality of rake combiners for synthesizing so as to maximize, the diversity processing means includes a selection diversity receiving means for selecting one of the output signals of the plurality of rake combiners having a large signal power. A spread spectrum communication receiver characterized by.
信号速度を有する拡散信号を乗ずることにより送信信号
のスペクトラムを広帯域に拡散した直接拡散スペクトラ
ム拡散通信方式の受信装置であり、 複数のアンテナと、 この複数のアンテナのそれぞれに接続され、受信信号の
周波数帯を無線周波数帯から中間周波数帯またはベース
バンド帯に変換する複数の受信機と、 この複数の受信機の出力に対してダイバーシチ処理を行
って復調するダイバーシチ処理手段とを備えたスペクト
ラム拡散通信受信装置において、 前記複数の受信機のそれぞれの出力に接続されスペクト
ラム拡散された受信信号の希望波を狭帯域信号に変換す
る逆拡散器を備え、 前記ダイバーシチ処理手段は、前記複数の逆拡散器の出
力信号に対して信号電力対雑音電力比が最大になるよう
にダイバーシチ合成する合成ダイバーシチ受信手段を含
むことを特徴とするスペクトラム拡散通信受信装置。3. A direct-spread-spectrum spread spectrum communication receiver in which a spectrum of a transmission signal is spread over a wide band by multiplying an information signal by a spread signal having a signal speed higher than that of the information signal, and a plurality of antennas are provided. And a plurality of receivers that are connected to each of the plurality of antennas and that convert the frequency band of the received signal from the radio frequency band to the intermediate frequency band or the baseband, and the diversity processing for the outputs of the plurality of receivers In a spread spectrum communication receiver including a diversity processing means for performing and demodulating, a despreader connected to each output of the plurality of receivers and converting a desired wave of a spread spectrum received signal into a narrow band signal. Wherein the diversity processing means has a signal power vs. noise power with respect to output signals of the plurality of despreaders. There spread spectrum communication receiver characterized in that it comprises a combining diversity reception means for diversity combining so as to maximize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5121249A JPH06334575A (en) | 1993-05-24 | 1993-05-24 | Spread spectrum communication reception equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5121249A JPH06334575A (en) | 1993-05-24 | 1993-05-24 | Spread spectrum communication reception equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06334575A true JPH06334575A (en) | 1994-12-02 |
Family
ID=14806594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5121249A Pending JPH06334575A (en) | 1993-05-24 | 1993-05-24 | Spread spectrum communication reception equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06334575A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998021848A1 (en) * | 1996-11-14 | 1998-05-22 | Matsushita Electric Industrial Co., Ltd. | Radio communication equipment using algorithm diversity |
| JPH10242936A (en) * | 1997-02-26 | 1998-09-11 | Saitama Nippon Denki Kk | Diversity receiver for spread spectrum communication system |
| KR100372515B1 (en) * | 1996-11-27 | 2003-06-12 | 엘지정보통신주식회사 | Small base station apparatus of cdma mobile communication system |
| US6980584B1 (en) | 1998-06-02 | 2005-12-27 | Canon Kabushiki Kaisha | Reception apparatus |
| JP2006279624A (en) * | 2005-03-30 | 2006-10-12 | Nec Corp | Receiver, its reception method, communication system and flying object |
| US7697643B2 (en) | 1995-01-04 | 2010-04-13 | Interdigital Technology Corporation | Setting a transmission power level for a mobile unit |
-
1993
- 1993-05-24 JP JP5121249A patent/JPH06334575A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7697643B2 (en) | 1995-01-04 | 2010-04-13 | Interdigital Technology Corporation | Setting a transmission power level for a mobile unit |
| US7961822B2 (en) | 1995-01-04 | 2011-06-14 | Interdigital Technology Corporation | Setting a transmission power level for a mobile unit |
| US8340228B2 (en) | 1995-01-04 | 2012-12-25 | Intel Corporation | Setting a transmission power level for a mobile unit |
| US8824523B2 (en) | 1995-01-04 | 2014-09-02 | Intel Corporation | Setting a transmission power level for a mobile unit |
| WO1998021848A1 (en) * | 1996-11-14 | 1998-05-22 | Matsushita Electric Industrial Co., Ltd. | Radio communication equipment using algorithm diversity |
| KR100372515B1 (en) * | 1996-11-27 | 2003-06-12 | 엘지정보통신주식회사 | Small base station apparatus of cdma mobile communication system |
| JPH10242936A (en) * | 1997-02-26 | 1998-09-11 | Saitama Nippon Denki Kk | Diversity receiver for spread spectrum communication system |
| US6980584B1 (en) | 1998-06-02 | 2005-12-27 | Canon Kabushiki Kaisha | Reception apparatus |
| JP2006279624A (en) * | 2005-03-30 | 2006-10-12 | Nec Corp | Receiver, its reception method, communication system and flying object |
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