Edge detection method and device for constant envelope same frequency interference

Abstract

The invention discloses an edge detection method and a device for constant envelope same frequency interference. The method comprises the following steps of: firstly recovering training sequence domain data of the cell, calculating average power of cell training sequence domain data; calculating power distribution of the received signals; obtaining power distribution of interference signals through obtaining difference values between the distributed power values and the average power of the cell training sequence domain data; and according to the power distribution of the interference signals, regarding a position with the maximal power change difference as a constant envelope edge position. The constant envelope edge position can express the characteristics of terminal signals and the interference signals at the constant envelope edge two sides for the received signals under asynchronous same frequency interference. Therefore, the method and the device are beneficial to a balance module to adopt different information channel estimation policies and data demodulation policies to different areas, and a demodulation performance of the balance module is improved.

Description

technical field [0001] The present invention relates to a single-antenna interference elimination technology, in particular to an edge detection technology for co-channel interference Background technique [0002] Due to problems such as cost, volume, power consumption, and design of mobile terminals, only one receiving antenna can be used on the receiving side of the mobile terminal, and the existing multi-antenna interference cancellation algorithm cannot be used. In order to solve the downlink co-channel interference of a single antenna, The industry proposes a series of Single Antenna Interference Cancellation (Single Antenna Interference Cancellation, “SAIC” for short) technologies on how to solve co-channel interference based on a single antenna condition. At present, the SAIC method used in the Global System for Mobile communication ("GSM") is generally as follows: the asynchronous co-frequency signal and noise signal of other cells are used as interference signals, a...

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Problems solved by technology

[0003] The inventors of the present invention found that using the existing SAIC method, in the case of synchronous and co-frequency coverage, some signal gain can be obtained, but it is not applicable to the situation of asynchronous and co-frequency signals, which will affect the performance of the equalization module. , it is necessary to provide a SAIC method suitable for asynchronous co-frequency interference

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