Radio receiver with diversity receiving function
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
H04B-001/06
H04M-001/00
출원번호
US-0057972
(2005-02-15)
등록번호
US-7305220
(2007-12-04)
발명자
/ 주소
Nishikawa,Takurou
Shimizu,Hirotoshi
Dateki,Takashi
출원인 / 주소
Fujitsu Limited
대리인 / 주소
Katten Muchin Rosenman LLP
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
A radio receiver includes a first sampling section and a second sampling section for sampling, in the predetermined sampling interval, a first receiving symbol and a second receiving symbol transmitted to the radio receiver via a first transmission route and a second transmission route, respectively
A radio receiver includes a first sampling section and a second sampling section for sampling, in the predetermined sampling interval, a first receiving symbol and a second receiving symbol transmitted to the radio receiver via a first transmission route and a second transmission route, respectively. The radio receiver further includes a diversity combining section for diversity combining sampling signals obtained by the respective sampling, sections and a control section for controlling a sampling position to obtain the difference between the sampling position of the first receiving symbol sampled by the first sampling section and the sampling position of the second receiving symbol sampled by the second sampling section such that the obtained difference is different from the difference in the sampling positions corresponding to the difference in timing between the first receiving symbol and the second receiving symbol.
대표청구항▼
What is claimed is: 1. A radio receiver, comprising: a first sampling section for sampling, in the predetermined sampling interval, a first receiving symbol obtained by receiving a first transmitting symbol transmitted via a first transmission route; a second sampling section for sampling, in the s
What is claimed is: 1. A radio receiver, comprising: a first sampling section for sampling, in the predetermined sampling interval, a first receiving symbol obtained by receiving a first transmitting symbol transmitted via a first transmission route; a second sampling section for sampling, in the sampling interval similar to said predetermined sampling interval, a second receiving symbol obtained by receiving said first transmitting symbol transmitted via a second transmission route; a diversity combining section for diversity combining sampling signals obtained by said first sampling section and second sampling section respectively; and a control section for controlling a sampling position to obtain a difference between a sampling position of said first receiving symbol which is sampled by said first sampling section and the corresponding sampling position of said second receiving symbol which is sampled by said second sampling section, said difference being different from a difference in sampling positions corresponding to the difference in time between a receiving timing of said first receiving symbol and a receiving timing of said second receiving symbol. 2. A radio receiver according to claim 1, further comprising two transmission route sections of which one is connected to said first sampling section and another is connected to said second sampling section, said transmission route sections executing a phase rotation process of received signals from said first and second sampling sections, respectively, to compensate for phase rotation of the signals received from said first transmission route and said second transmission route, respectively. 3. A radio receiver according to claim 2, further comprising a signal processing section, wherein said diversity combing section is connected to each of said transmission route sections to combine sampling signals after compensation by said first and second transmission route sections to apply a combined signal to said signal processing section. 4. A radio receiver for diversity reception of signals of two signal receiving systems, said signals being received with two antennas, via a first transmission route and a second transmission route, respectively the radio receiver comprising: a first sampling section for sampling a received signal of a first signal receiving system; a second sampling section for sampling a received signal of a second signal receiving system; a diversity combining section for diversity combining signals sampled by said first sampling section and said second sampling section; a timing generating section for generating a sampling timing; and a timing control section for controlling at least one of a first sampling timing for said first sampling section and a second sampling timing for said second sampling section to cause a specified amount of deviation between said first sampling timing and said second sampling timing. 5. The radio receiver according to claim 4, wherein said specified amount of deviation is larger than zero (0) but equal to or smaller than a half of the interval of sampling timing. 6. The radio receiver according to claim 4, further comprising: a setting control section for presetting said specified amount of deviation of said sampling timing to a certain value which is equal to or smaller than a half of the sampling interval and changing a preset specified amount preset by said control section setting to approximate the sampling timing of the other sampling section to the sampling timing of the sampling section corresponding to the signal receiving system at a high quality side on the basis of the quality of the received signal of the first signal receiving system after the sampling by said first sampling section after said presetting and the quality of the received signal of the second signal receiving system after the sampling by said second sampling section. 7. The radio receiver according to claim 4, further comprising an evaluating section evaluating the quality of the received signal of the first signal receiving system after the sampling by said first sampling section and the quality of the received signal of the second signal receiving system after the sampling by said second sampling section, wherein a selected signal is applied to said selecting and combining section from said evaluating section to select the signal of the signal receiving system having a higher receiving quality as evaluated by said evaluating section. 8. A radio receiver according to claim 4, further comprising two transmission route sections of which one is route sections of which one is connected to said first sampling section and another is connected to said second sampling section, said transmission route sections executing a phase rotation process of received signals from said first and second sampling sections, respectively, to compensate for phase rotation of the signals received from said first transmission route and said second transmission route, respectively. 9. A radio receiver according to claim 8, further comprising a signal processing section, wherein said diversity combing section is connected to each of said transmission route sections to combine sampled signals after compensation by said first and second transmission route sections to apply a combined signal to said signal processing section.
Gilhousen Klein S. (San Diego CA) Jacobs Irwin M. (La Jolla CA) Padovani Roberto (San Diego CA) Weaver ; Jr. Lindsay A. (San Diego CA) Wheatley ; III Charles E. (Del Mar CA) Viterbi Andrew J. (La Jol, System and method for generating signal waveforms in a CDMA cellular telephone system.
Gilhousen, Klein S.; Jacobs, Irwin M.; Padovani, Roberto; Weaver, Jr., Lindsay A.; Wheatley, III, Charles E.; Viterbi, Andrew J., System and method for generating signal waveforms in a CDMA cellular telephone system.
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