Characteristic prefix code detection-based message positioning method

Abstract

The invention belongs to the technical field of message positioning of a WCDMA (Wideband Code Division Multiple Access) system and particularly relates to a characteristic prefix code detection-based message positioning method. The method comprises the specific steps of (1) receiving sampling data of an uplink access channel through a gigabit Ethernet; (2) performing fast Fourier transformation on the sampling data and storing the sampling data; (3) respectively performing fast Fourier transformation on each group of characteristic prefix codes; (4) respectively performing complex multiplication operation on the data Fourier transformation result obtained in the step (2) with the fast Fourier transformation result of each group of characteristic prefix codes; (5) performing inverse fast Fourier transformation on the complex multiplication result; (6) performing modulus square on the inverse fast Fourier transformation result, and detecting a peak value. A programmable logic device can be used to detect the uplink access channel, and quick and accurate signal processing is realized.

Description

Technical field [0001] The invention belongs to the technical field of message positioning of WCDMA systems, and particularly relates to a message positioning method based on characteristic prefix code detection. Background technique [0002] In the mobile communication system, the wireless signal between the base station and the mobile station is transmitted in the mobile channel. In the WCDMA system, the user must obtain a proprietary ID, adjust the timing and be assigned a certain time-frequency resource before obtaining the transmission uplink data fully synchronized with the base station. This process is generally called "asynchronous user random access process" , Referred to as "random access". [0003] In the WCDMA communication system, the random access process plays a very important role. In the random access process, the UE (user terminal) does not know the distance to the base station and the quality of the wireless environment, so the UE will use a smaller power to se...

AI Technical Summary

Problems solved by technology

Therefore, the complexity of the design process of this implementation will be very high, and the amount of calculation will also increase.

[0006] Through the above processing method, it can be seen that in the access process of the WCDMA uplink random access channel, two channels, PRACH and AICH, need to be processed, which will increase the complexity of the design and is not simple and fast enough.

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