Signal transmitting/receiving apparatus and method of multi-input-output wireless communication system

Abstract

The transmitting set includes following parts: a demultiplexer in use for dividing inputted information sequence into multiple paths to obtain multiple shunting signals; multiple transmitting units corresponding to multiple shunting signals. Each transmitting unit includes parts: a serial-to-parallel converter in use for carrying out serial-to-parallel conversion for the shunting signals in order to obtain multiple blocks of signal in prearranged length; encoder for time space packet in use for carrying out time space packet encoding for blocks of signal so as to obtain encoded blocks of signal; the encoded blocks of signal possess orthogonality in frequency domain. The invention discloses transmitting set as well as transmission / reception method. Comparing with prior art, the invention possesses higher code rate, and lower complexity of calculation, as well as is more suitable to time-varying channel in quick change.

Description

technical field [0001] The present invention relates to a transmitting / receiving device and a transmitting / receiving method applied in the field of wireless communication, in particular to a signal transmitting / receiving device and a transmitting / receiving method of a multiple-input multiple-output wireless communication system. Background technique [0002] In the wireless communication system, the fading effect of the wireless channel seriously affects the receiving quality of the signal, and diversity technology is an effective method to deal with the fading effect. The traditional diversity technology is to configure multiple antennas in the receiving device, and to process multiple copies of the same transmitted signal in the receiving device, such as maximum ratio combining, to achieve diversity gain, so that the bit error rate of the received signal is lower than that of a single-antenna system There are noticeable improvements. [0003] According to the research res...

AI Technical Summary

Problems solved by technology

However, in broadband wireless communication systems, the channel will exhibit frequency-selective fading, so it is more practical to study the multi-antenna transmission scheme and the corresponding receiving method in the frequency-selective channel

[0013] In order to utilize the existing space-time block coding based on flat-fading channels, the frequency-selective channel can be converted into a flat-fading channel by a time-domain Multiple Input Multiple Output (MIMO) equalizer in the receiving device. The disadvantage of the method is the high computational complexity of the time-domain MIMO equalizer

Moreover, since OFDM adopts multi-carrier transmission, carrier offset will cause inter-carrier interference, which seriously affects the detection of transmitted signals.

[0014] To sum up, the existing technology has the disadvantages of low code rate, complicated calculation, and difficult detection. There is an urgent need for a wireless communication method with high code rate, low computational complexity, and low sensitivity to carrier offset.

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