Multi-input multi-output orthogonal frequency division multiplexing system transmission method and transceiver

Abstract

This invention discloses a transmission method of orthogonal frequency division multiplexing with multiple inputs and outputs, including: (1) an emitting end processes space-frequency coding to emitted data and processes space-time coding to the data, then processes serial / parallel transformation, inverse fast Fourier transform algorithmic transformation, adding cyclic prefix, parallel / serial transformation, then emits the data; (2) after receiving the data received from the emitting end, a receiving end respectively processes removing cyclic prefix, serial / parallel transformation, inverse fast Fourier transform algorithmic transformation and parallel / serial transformation to the received data in two symbol periods, then processes space-time decoding to the data, at last processes data combination. This invention further discloses a MIMO OFDM system coding emitter and a receiver, and an emitting method and a receiving method. This invention obtains an effective transreceiver suitable for adopting the MIMO OFDM system of space-time frequency coding and corresponding transmission method through adjusting a transreceiver mechanism under the condition of not increasing the transreceiver complexity.

Description

technical field [0001] The present invention relates to transceiver technology in the field of mobile communication, in particular to a MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) system transmission method and a transceiver. Background technique [0002] The MIMO system can provide both diversity gain and multiplexing gain. Most of the existing MIMO technologies are originally designed to obtain the maximum diversity gain or multiplexing gain. For example, space-time coding STC (Space-Time Codes) - including space-time coding (Space-Time Block Code, referred to as STBC), space-frequency coding (Space-Frequency Block Code, referred to as SFBC) and space-time trellis code (Space-Time Block Code) -Time Trellis Code, STTC) - designed to obtain the greatest diversity gain; and layered space-time code (Bell Laboratories Layered Space Time, BLAST) and vertical la...

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Problems solved by technology

However, the introduction of the orthogonal relationship also brings the following problems: first, the coding gain of SFBC is only related to the structure of the signal constellation diagram used, and there is no good coding gain optimization method; second, if a 2 b The constellation diagram of signal points, the SFBC frequency band utilization can only be achieved when there are two antennas at the transmitting end b bit / (s·Hz) , when the number of antennas increases, its frequency band utilization is at most only 3 / 4 of the maximum value

Third, this OFDM with cyclic prefix converts a frequency-selective fading channel into N parallel flat-fading sub-channels, but it is difficult to effectively suppress inter-group interference and multi-user interference

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