Multi-user block-transmission communication transmitting method and receiving method

Abstract

The invention discloses a new emission method and reception method of multi-user block transmission communication. The emission method is that the Nu userí»s data are divided as the unit with K symbols; the K symbols of each user are repeated N times at time domain; and each of them is formed to Nu pectination frequency spectrum symbol sequences whose length are M; the sequence are modulated as quadrature carrier to make the each userí»s symbol sequence frequency spectrum not be aliasing each other; the Nu symbol sequences are superposed to form data blocks whose length is M; thus, the steps of partitioning and multiple access are completed. Correspondingly, the reception method is that multiple access separation is did according to the frequency spectrum took up by the user who need to receive to gain K symbol sequences of the user needed. The technical proposal of the invention is adopts to utilize the quadrature carrier modulation to do multiple access at the emission end, and utilize the jump corresponding operation with low complexity to separate the user data at the reception end. Thus, the complexity of the post-treatment is reduced.

Description

Technical field: [0001] The present invention relates to the design of a new multi-user block transmission communication system, especially to the transmitting method and receiving method therein. Background technique: [0002] Such as image 3 Shown is a schematic diagram of signal transmission and reception of a traditional Single Carrier Cyclic prefix block transmission (Single Carrier Cyclic prefix block transmission) communication system, ie, an SC-CP communication system. At the transmitter 13, the data is divided into data blocks of M symbols by the data block dividing device 11, and then a cyclic prefix of length L is added by the adding cyclic prefix device 12, and then transmitted after carrier modulation; the signal is transmitted through frequency selective fading The channel 14 is received by the receiver 19; the receiver first divides the received data into data blocks of M+L symbols through the data block division device 15 according to the synchronization inf...

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Problems solved by technology

[0003] The above-mentioned traditional SC-CP system has a low peak-to-average ratio (Peak to Average Rate, PAR), is insensitive to frequency offset, and can obtain the advantage of frequency diversity, but it has the following disadvantages: (1). The input method is very limited, only time division multiple access (TDMA) can be used

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