IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0871013
(2007-10-11)
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등록번호 |
US-7835433
(2011-01-16)
|
우선권정보 |
JP-2006-278353(2006-10-12) |
발명자
/ 주소 |
- Sanada, Yukitoshi
- Yokoshima, Hideki
- Abe, Masayoshi
- Kondo, Yuya
- Tokoro, Mario
|
출원인 / 주소 |
|
대리인 / 주소 |
Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
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인용정보 |
피인용 횟수 :
1 인용 특허 :
7 |
초록
▼
A receiver apparatus is disclosed. The receiver apparatus includes a plurality of signal receiving devices and a plurality of channel signal outputting devices for sampling signals received by the signal receiving devices at sampling rates switched within a predetermined range or between multiple va
A receiver apparatus is disclosed. The receiver apparatus includes a plurality of signal receiving devices and a plurality of channel signal outputting devices for sampling signals received by the signal receiving devices at sampling rates switched within a predetermined range or between multiple values and outputting channel signals. The receiver apparatus also includes control devices for controlling the sampling rates in the channel signal outputting devices. The receiver apparatus also includes response estimating devices for estimating responses on the basis of the channel signals output from the channel signal outputting devices. The receiver apparatus also includes evaluating devices for evaluating reception characteristics on the basis of the responses estimated by the response estimating devices. The receiver apparatus further includes determining devices for determining the sampling rates in the channel signal outputting devices on the basis of the reception characteristics at the multiple sampling rates evaluated by the evaluating devices.
대표청구항
▼
What is claimed is: 1. A receiver apparatus comprising: a plurality of signal receiving means; a plurality of channel signal outputting means for sampling signals received by the plurality of signal receiving means at sampling rates switched within a predetermined range or between multiple values a
What is claimed is: 1. A receiver apparatus comprising: a plurality of signal receiving means; a plurality of channel signal outputting means for sampling signals received by the plurality of signal receiving means at sampling rates switched within a predetermined range or between multiple values and outputting channel signals; control means for controlling the sampling rates in the plurality of channel signal outputting means; response estimating means for estimating responses on the basis of the channel signals output from the plurality of channel signal outputting means; evaluating means for evaluating reception characteristics on the basis of the responses estimated by the response estimating means; and determining means for determining the sampling rates in the plurality of channel signal outputting means on the basis of the reception characteristics at the multiple sampling rates evaluated by the evaluating means. 2. The receiver apparatus according to claim 1, wherein, during a period when secondary information necessary for receiving main information is received before the main information is received, the control means controls the sampling rates in the plurality of channel signal outputting means so that the response estimating means estimates the responses at the multiple sampling rates, the response estimating means estimates the responses at the multiple sampling rates in the plurality of channel signal outputting means, the evaluating means evaluates the reception characteristics on the basis of the responses at the multiple sampling rates in the plurality of channel signal outputting means, and the determining means determines a predetermined sampling rate at which each channel signal outputting means samples a signal corresponding to the main information, on the basis of the reception characteristics evaluated by the evaluating means, and wherein, during a period when the main information is received, the control means controls the sampling rates in the plurality of channel signal outputting means so as to be the predetermined sampling rates. 3. The receiver apparatus according to claim 1, wherein the signals are sampled at different sampling points at the different sampling rates in the plurality of channel signal outputting means. 4. The receiver apparatus according to claim 2, wherein the evaluating means evaluates the reception characteristics in all the combinations of the multiple sampling rates in the plurality of channel signal outputting means, and wherein the determining means determines a predetermined combination of the sampling rates in which the plurality of channel signal outputting means sample the signals corresponding to the main information on the basis of the reception characteristics evaluated by the evaluating means in all the combinations of the multiple sampling rates in the plurality of channel signal outputting means. 5. The receiver apparatus according to claim 4, wherein the determining means determines a combination of the sampling rates having the highest evaluation value, among the values of the reception characteristics evaluated by the evaluating means in all the combinations of the multiple sampling rates in the plurality of channel signal outputting means, to be the combination of the sampling rates in which the plurality of channel signal outputting means sample the signals corresponding to the main information. 6. The receiver apparatus according to claim 4, wherein the determining means compares the values of the reception characteristics in all the combinations of the multiple sampling rates in the plurality of channel signal outputting means, evaluated by the evaluating means, with a predetermined threshold value, and determines a combination having the smallest amount of power consumption, among the combinations providing the evaluated values higher than the predetermined value, to be the combination of the sampling rates in which the plurality of channel signal outputting means sample the signals corresponding to the main information. 7. The receiver apparatus according to claim 1, wherein each channel signal outputting means includes analog-to-digital converting means for oversampling the received signal and converting the signal into a digital signal; and rate varying means for varying a rate of the digital signal resulting from the conversion by the analog-to-digital converting means and outputting the channel signal at the sampling rate controlled by the control means. 8. The receiver apparatus according to claim 1, further comprising: demodulating means for demodulating the received signals on the basis of the responses estimated by the response estimating means. 9. The receiver apparatus according to claim 8, further comprising: combination control means for controlling the number of fingers and a tap coefficient in RAKE combination on the basis of the responses estimated by the response estimating means. 10. The receiver apparatus according to claim 8, wherein the demodulating means separates multiple signals transmitted through multiple antennas to demodulate the separated signals. 11. The receiver apparatus according to claim 8, further comprising: combination control means for controlling a diversity factor on the basis of the responses estimated by the response estimating means. 12. A receiving method for a receiver apparatus receiving signals with a plurality of signal receiving means including different antennas, the method comprising the steps of, during a period when signals corresponding to secondary information necessary for receiving main information are received before the main information is received: sampling the received signals corresponding to the secondary information, received through the antennas in the plurality of signal receiving means, at multiple sampling rates controlled so as to estimate responses at the multiple sampling rates; estimating the responses of the received signals corresponding to the secondary information sampled at the multiple sampling rates; evaluating reception characteristics at the multiple sampling rates of the received signals received by the plurality of signal receiving means on the basis of the estimated responses at the multiple sampling rates; and determining a predetermined sampling rate at which each signal receiving means samples the signal corresponding to the main information, on the basis of the evaluated reception characteristics, and the method comprising the steps of, during a period when signals corresponding to the main information are received: controlling the sampling rates at which the received signals corresponding to the main information are sampled so as to be the predetermined sampling rates determined for every signal receiving means; and sampling the received signals corresponding to the main information, received through the multiple antennas in the plurality of signal receiving means, at the predetermined sampling rates. 13. A non-transitory computer readable storage medium encoded with a computer-executable program for controlling processing of received signals, the program comprising the steps of, during a period when signals corresponding to secondary information necessary for receiving main information are received before the main information is received: controlling sampling of the received signals corresponding to the secondary information, received through multiple antennas in a plurality of signal receiving means, at multiple sampling rates controlled so as to estimate responses at the multiple sampling rates; estimating the responses of the received signals corresponding to the secondary information sampled at the multiple sampling rates; evaluating reception characteristics at the multiple sampling rates of the received signals received by the plurality of signal receiving means on the basis of the estimated responses at the multiple sampling rates; and determining a predetermined sampling rate at which each signal receiving means samples the signal corresponding to the main information on the basis of the evaluated reception characteristics, and the program comprising the steps of, during a period when signals corresponding to the main information are received: controlling the sampling rates at which the received signals corresponding to the main information are sampled so as to be the predetermined sampling rates determined for every signal receiving means; and controlling sampling of the received signals corresponding to the main information, received through the multiple antennas in the plurality of signal receiving means, at the predetermined sampling rates. 14. A non-transitory recording medium having the program according to claim 13 recorded thereon. 15. A receiver apparatus comprising: a plurality of signal receiving units; a plurality of channel signal outputting units that samples signals received by the plurality of signal receiving units at sampling rates switched within a predetermined range or between multiple values and outputs channel signals; a control unit that controls the sampling rates in the plurality of channel signal outputting units; a response estimating unit that estimates responses on the basis of the channel signals output from the plurality of channel signal outputting units; an evaluating unit that evaluates reception characteristics on the basis of the responses estimated by the response estimating unit; and a determining unit that determines the sampling rates in the plurality of channel signal outputting units on the basis of the reception characteristics at the multiple sampling rates evaluated by the evaluating unit.
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