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Wireless communication apparatus and wireless communication method

A technology for wireless communication equipment and error signals, which is applied in the field of wireless communication equipment and wireless communication, wireless communication equipment and its wireless communication, and wireless communication equipment, and can solve the problem of reduced signal-to-noise (SN) ratio of receiving sampling points and increased processing burden , Received data cannot be demodulated into original data, etc., to achieve the effect of increasing the processing burden

Inactive Publication Date: 2008-06-25
SONY GRP CORP
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AI Technical Summary

Problems solved by technology

The offset of the received sampling point not only leads to a decrease in the signal-to-noise (SN) ratio of the received sampling point, but also causes a serious problem as follows: If the offset exceeds one symbol period, the received data cannot be demodulated into the original data
Therefore, if a constant envelope modulation system such as π / 2 Biphase Phase Shift Keying (BPSK) is used in which the amplitude of the high frequency signal does not change with time, there is a problem that it is difficult to obtain The difference between the integral magnitude values ​​of
In addition, oversampling is usually performed X times (X is greater than or equal to a natural number 4) per symbol, so as the symbol rate increases, the processing burden on the A / D converter increases

Method used

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  • Wireless communication apparatus and wireless communication method
  • Wireless communication apparatus and wireless communication method
  • Wireless communication apparatus and wireless communication method

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Embodiment Construction

[0035] Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

[0036] FIG. 1 schematically shows the structure of a wireless communication device to which an embodiment of the present invention is applicable. The wireless communication device shown in Fig. 1 includes a transmitting branch and a receiving branch. The transmit branch includes a medium access control (MAC) processor 11 for performing the processing of the MAC layer protocol, a PHY / BB processor 12 for performing the processing of the physical (PHY) layer protocol and the baseband (BB) layer protocol, for A digital-to-analog converter (DAC) 13 for converting digital transmit signals to analog transmit signals, and an RF transmit processor 14 for performing radio frequency (RF) processing on the analog transmit signals. The receive branch contains an RF receive processor 15 for performing RF processing on the analog receive signal and an analog-to-digital conv...

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Abstract

A wireless communication apparatus for performing reception processing while tracking a symbol timing obtained by synchronization, the wireless communication apparatus includes a resampler for performing resampling to oversample a received symbol in a plurality of phases by using a sampling rate higher than a symbol rate, a phase-error detector for obtaining a phase error in a time sequence at each of sampling points where the resampling is performed, an error-signal generator for generating an error signal on the basis of the phase error detected at each of the sampling points where the resampling is performed, and a sampling point controller for detecting an offset direction at each of the sampling points on the basis of the error signal and for controlling an offset direction of each of the sampling points of the received symbol.

Description

technical field [0001] The present invention relates to a wireless communication device and a wireless communication method that receive radio signals transmitted from a transmitter. More particularly, the present invention relates to a wireless communication device and a wireless communication method that receive a radio signal encoded by a transmitter and digitally modulated. [0002] More specifically, the present invention relates to a wireless communication device and a wireless communication method that, in the case where there is a frequency offset between an oscillator installed in a transmitter and an oscillator installed in a receiver, in Reception processing is performed while symbol tracking is performed so as not to lose the obtained synchronization symbol timing. In particular, the present invention relates to a wireless communication device that can be used in a constant-envelope modulation system and that performs symbol tracking in order to speed up a symbol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/707H04J13/00H04B1/7075H04B1/7085H04L27/22
CPCH04L2027/0036H04L27/227
Inventor 渡部胜己
Owner SONY GRP CORP
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