Cellular cell identification method for broad band wireless mobile communications

Abstract

The invention relates to a cell recognition method used for broadband wireless mobile communication, belonging to the field of digital information transmission technology. Firstly, a cell base station generates multinomial according to pseudo-random sequence and generates pseudo noise sequence according to cell serial number; the multinomial and the pseudo noise sequence are combined with processed source information and sent out; the received signals are split so as to extract the pseudo noise sequence; the cell serial number is judged according to register shift times between the pseudo noise sequences, thus completing the recognition of the cell. The method retains the advantages such as fast synchronous speed and exact channel evaluation, which an orthogonal frequency division multiplexing system which adopts pseudo noise sequence to fill the protection intervals has; furthermore, the method has simple disposal and low complexity and is easy to be realized at the base station and a user terminal. Furthermore, the method need not to involve other expenses in a frame structure, thus effectively ensuring the transmission efficiency of the system and having extremely excellent performance.

Description

technical field [0001] The invention relates to a cellular cell identification method used in broadband wireless mobile communication, and belongs to the technical field of digital information transmission. Background technique [0002] Orthogonal Frequency Division Multiplexing (hereinafter referred to as OFDM) is a technology to combat frequency selective fading and improve system performance. The main idea is to divide the channel into several orthogonal sub-channels in the frequency domain, convert the high-speed data stream into parallel low-speed sub-data streams, and modulate them to each sub-channel for transmission. The signal bandwidth on each subchannel is smaller than the coherence bandwidth of the channel, so the spectral characteristics of each subchannel are approximately flat. This greatly reduces the intersymbol interference. [0003] In order to maximize the elimination of inter-symbol interference caused by multipath propagation, a guard interval is gene...

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Problems solved by technology

[0007] The purpose of the present invention is to propose a cell identification method used in wireless mobile communications, which distinguishes different cells according to the number of shifts registered between the pseudo-random noise sequences, without introducing other overheads. It can effectively obtain the information of the current cell, thus solving the problem of cell identification in the OFDM system using pseudo-random noise sequences to fill the guard interval

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