Offset modulation multi-carrier frequency division multiple access transmission method with adjustable bandwidth

Abstract

The invention discloses an adjustable bandwidth offset modulation multi-carrier frequency division multiple access transmission method which comprises the steps of generating a sending signal on a sending end and a processing a receiving signal on a receiving end, wherein the whole frequency band is divided into a plurality of sub bands to be allocated to different uses for realizing frequency division multiple access, each sub band (user) adopts offset modulation, bandwidth of each sub band (user) can be independently determined, frequency spectrum overlapping is allowed among the sub bands (users), the receiving end adopts a low-complexity frequency domain balance-based iteration decoding receiver, and can realize sending diversity under the condition of dual sending antennae. According to the method provided by the invention, the peak-to-average ratio of the sending signal is greatly lowered under the condition of keeping the frequency spectrum efficiency, the dynamic and flexible frequency spectrum resource allocation is realized; and meanwhile, by adopting a multi-user united frequency domain balance-based iteration receiving signal processing method, the transmission reliability is ensured at lower complexity.

Description

technical field [0001] The invention belongs to the field of communication, and relates to a method for generating a sending signal of a communication system and processing a receiving signal. Background technique [0002] Orthogonal Frequency Division Multiplexing (OFDM) and Single Carrier Frequency Division Multiple Access (SC-FDMA) are currently two common multi-carrier frequency division multiple access transmission technologies. OFDM has the advantages of simple implementation, robustness against frequency selective fading, and easy support for multi-antenna technology, but it also has the disadvantage of large fluctuations in the envelope of the transmitted signal, which limits its power efficiency, especially in the uplink of wireless communication systems. in the application. [0003] In the SC-FDMA system, the DFT matrix is ​​used to precode the transmitted data vector of each user before it is mapped to the subcarriers of the OFDM system. The resulting transmitte...

AI Technical Summary

Problems solved by technology

A major disadvantage of this multiple access transmission technology is that different users use the same bandwidth, which is not conducive to flexible allocation of wireless resources according to user needs

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