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Uplink macro-diversity reception method of orthogonal frequency division multiplex cellular communication system

A cellular communication system and orthogonal frequency division technology, which is applied in the field of uplink macro-diversity reception of an OFDM cellular communication system, and can solve problems such as the reduction of the uplink data rate of cell edge users

Active Publication Date: 2007-02-14
BEIJING UNIV OF POSTS & TELECOMM
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AI Technical Summary

Problems solved by technology

Aiming at the problem that the uplink data rate of cell edge users decreases, the present invention proposes an uplink macro-diversity method based on OFDM system

Method used

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  • Uplink macro-diversity reception method of orthogonal frequency division multiplex cellular communication system
  • Uplink macro-diversity reception method of orthogonal frequency division multiplex cellular communication system

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Embodiment Construction

[0013] The uplink macrodiversity method in the cellular wireless communication system using OFDMA as the multiple access mode of the present invention includes two modes of inter-cell macrodiversity and intersector macrodiversity. The OFDM pilot signal is used to determine whether the user adopts macrodiversity, what kind of macrodiversity is adopted, and multiple antennas (or antenna arrays) are used to participate in macrodiversity, and the antennas (or antenna arrays) participating in macrodiversity will respectively receive the signal FFT demodulation, and then transmit the information on the subcarriers of the macro-diversity users to the macro-diversity merging device, and respectively perform merging with the goal of maximizing the signal-to-noise ratio of the signals after FFT demodulation.

[0014] In the present invention, the receiving antenna (or antenna array) participating in macro-diversity transmits the subcarrier information after FFT demodulation, together wit...

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Abstract

This invention discloses a receiving method for up-stream macro-diversities of OFDM cellular communication including: 1, the system selects multiple base station antennas with the optimum chain performance to receive the up-line signals of users of the edges of non-sector local areas in the cellular communication system, 2, said system selects multiple fan area antennas with the best chain performance to receive the up-line signals of the users at the edges of sector areas, 3, these antennas demodulate the received signals by quick Fourier transform and make the maximum S / N ratio combination to the information on the sub-carriers used by the users so as to increase the up-line rate of the users.

Description

technical field [0001] The present invention relates to a cellular wireless communication system adopting Orthogonal Frequency Division Multiplexing (OFDM), and particularly relates to a receiving method of uplink macro-diversity in the system. Background technique [0002] Since Orthogonal Frequency Division Multiplexing (OFDM) has the characteristics of high spectrum utilization, effective resistance to fast fading, and low implementation complexity, it has been generally regarded as the preferred transmission technology for super-three-generation mobile communications. The multiple access method of OFDMA in the OFDM system is the most suitable multiple access method for cellular wireless communication. The so-called OFDMA means that different users use different subcarrier resources to access the system, and the system distinguishes users through different subcarrier resources. [0003] In existing cellular communication systems, a mobile station communicates with only o...

Claims

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Application Information

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IPC IPC(8): H04B7/08H04L27/26
Inventor 陶小峰张平唐超徐凯刘宝玲许晓东吴春丽刘莉莉
Owner BEIJING UNIV OF POSTS & TELECOMM
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