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Interference processing method based on carrier interferometry orthogonal frequency division multiplexing (CI-OFDM) system

A technology of CI-OFDM and processing methods, which is applied in baseband system components, multi-frequency code systems, shaping networks in transmitters/receivers, etc., can solve problems such as poor performance and narrow application range, and reduce complexity , Simple operation, the effect of interference elimination

Inactive Publication Date: 2011-08-10
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of narrow application range and poor performance in the existing CI-OFDM system for interference processing

Method used

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  • Interference processing method based on carrier interferometry orthogonal frequency division multiplexing (CI-OFDM) system
  • Interference processing method based on carrier interferometry orthogonal frequency division multiplexing (CI-OFDM) system
  • Interference processing method based on carrier interferometry orthogonal frequency division multiplexing (CI-OFDM) system

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Embodiment Construction

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. It should be understood that the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0014] In order to make the method of the present invention described more clearly, below in conjunction with figure 1 The CI-OFDM receiving process is described. Specifically include the following steps:

[0015] Step 1: Digital modulation. Digitally modulate the source data to obtain the digitally modulated data symbol s i , i=0, L, N-1.

[0016] Step 2: Carrier interference code extension. For the digitally modulat...

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Abstract

The invention discloses an interference processing method based on a carrier interferometry orthogonal frequency division multiplexing (CI-OFDM) system. The method is characterized in that a transceiver structure of the CI-OFDM system carries out OFDM receipt after a transceiver receives data so as to obtain frequency domain data after the OFDM receipt; and an interference detection result, the ratio that interference bandwidth accounts for total communication channel bandwidth as well as interference power are utilized to process the frequency domain data. By adopting the characteristic thatthe CI-OFDM is utilized to expand each path of low-speed parallel data to all sub-carries via using orthogonal CI codes, according to performance differences exerted by resisting different interferences via using the CI-OFDM under minimum mean squared error (MMSE) equilibrium, a traditional CI-OFDM is introduced under the MMSE equilibrium; the CI-OFDM performing zero setting on interfered sub-carriers at a receiving end and the CI-OFDM with consideration of the interference power of the MMSE equalizer carry out self-adaptive processing on power and bandwidth of different interference signals,thus effectively eliminating the interferences.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to an interference processing method of a carrier interference OFDM (Carrier Interferometry Orthogonal Frequency Division Multiplexing, CI-OFDM) system. Background technique [0002] In recent years, researchers have proposed a new system of carrier interference orthogonal frequency division multiplexing CI-OFDM. While retaining the high spectrum utilization rate of Orthogonal Frequency Division Multiplexing (OFDM) and the ability to resist frequency selective fading, CI-OFDM extends each channel of low-speed parallel data to Simultaneous transmission on all subcarriers results in frequency domain diversity gain. In particular, the CI-OFDM system that adopts minimum mean square error (Minimum Mean Squared Error, MMSE) equalization can completely eliminate the influence of channel deep fading, and bring better bit error rate (Bit Error Rate, BER) than traditional OFDM system. )...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L25/02H04L25/03
Inventor 陈肖虎王军高培李少谦
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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