A multi-frame-based wmsa search method in wcdma multi-user interference

Abstract

The invention discloses a multi-frame-based WMSA (Weighted Multi-slot Averaging) searching method for use in WCDMA (Wideband Code Division Multiple Access) multi-user interference, and relates to searching and a frame synchronization tracking technology of wireless signals in the mobile communication field. The WMSA searching method comprises the following steps that: 1, a radio-frequency front-end receiver receives a base station transmitted signal and a transmitted signal of a target WCDMA terminal through a front-end radio-frequency module; 2, a downlink digital signal processor processes a WCDMA base station signal, and resolves the base station signal to obtain an uplink DCH (Dedicated Channel) scrambling code and synchronization point position information of a target WCDMA terminal; 3, an uplink pilot frequency energy signal calculator processes the obtained uplink DCH scrambling code and the synchronization point position information to obtain pilot frequency energy transmitted by the target terminal, a signal-to-noise ratio and a peak index value; and 4, an energy screening device judges and screens reported energy so as to further improve system performance. The WMSA searching method has the advantages of easiness in implementation, high instantaneity, remarkable multi-user interference resistance and capability of effectively detecting weak signals.

Description

technical field [0001] The present invention relates to the search of wireless signal and its frame synchronous tracking technology in the field of mobile communication, especially relate to a kind of WCDMA (Wideband Code Division Multiple Access technology) multi-user interference based on multi-frame WMSA (multi-slot weighted average) in the life detector Estimation method) search method has the advantages of anti-multi-user interference, wide search range, simple algorithm and easy implementation. Background technique [0002] As WCDMA terminals become more and more popular, more and more users use WCDMA terminals for wireless communication. In private network wireless communication and disaster search and rescue, it is possible to accurately detect the WCDMA signal source of the target user, so as to be used in disasters. Rescue the trapped people in a timely and accurate manner. Since the domestic WCDMA network uses a large number of 2.1G frequency bands, the signal at...

AI Technical Summary

Problems solved by technology

Since the domestic WCDMA network uses a large number of 2.1G frequency bands, the signal attenuation speed is faster than other network standards, thus affecting the detection range of the WCDMA target signal source, especially in an environment with large multi-user interference, if the target is far away from the base station , the position of the frame synchronization point of the weak signal may not be searched by the traditional method, which increases the difficulty of accurate detection of the target signal

[0003] The traditional search method has great limitations on WCDMA signal synchronous search, and has a great disadvantage in the detection ability of weak target signals. It is urgent to provide an improved search method to overcome the above defects

Images