Digital matching filter for WCDMA (wideband code division multiple access) communication

Abstract

The invention discloses a digital matching filter for WCDMA (wideband code division multiple access) communication. An A / D (analog to digital) conversion module is used for carrying out sampling quantization on each collected sampling value, a serial / parallel conversion module is used for dividing samplings in former and later n times for a same code sheet to obtain data with an odd power and an even power sequences of a path I and a path Q, a matching filter module is used for carrying out data matching on the data with odd power and the even power sequences of the path I and the path Q through a Golay sequence correlator, the serial / parallel conversion module is used for recovering the data with the odd power and the even power sequences of the path I and the path Q output by the matching filter module into an original data sequences of the path I and the path Q, a quadratic sum calculation module is used for carrying out quadratic sum calculation on the original data sequences of the path I and the path Q, and a relative detection module is used for carrying out peak value detection on a result of the quadratic sum calculation of the original data sequences of the path I and the path Q output by the quadratic sum calculation module to realize synchronization of a main synchronization sequence; and hardware resource is reduced, a data processing speed is improved, a synchronous sequence in time slot synchronization of WCDMA communication system community searching is rapidly captured.

Description

technical field [0001] The invention belongs to the technical field of digital signal processing, in particular to a digital matched filter for WCDMA communication. Background technique [0002] As a new technology, WCDMA adopts the direct spread mode, the carrier bandwidth is 5MHz, the indoor transmission rate can reach 2Mbit, and the outdoor transmission rate can reach 384kbps. It adopts the MCFDD duplex mode and has good compatibility and interoperability with the GSM network. Various manufacturers of all ages. In recent years, underground communication in mines has gradually replaced wired communication with wireless communication. Because the communication environment in underground mines is extremely harsh, in order to realize wireless communication, the existing wireless communication system must be optimized before it can be applied. WCDMA communication system is the core of mine communication. optimal choice. [0003] In the WCDMA communication system, there is no...

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Problems solved by technology

[0006] The present invention provides a digital matched filter for WCDMA communication, aiming at solving the problem of traditional digital matched filter, which has a large number of taps, huge hardware overhead, huge power consumption, and the structure cannot meet the requirements of fast cell search in WCDMA system. At the same time, the traditional digital matched filter structure increases rapidly with the increase of the sampling rate, and the multiplication and addition units and registers also increase rapidly, which reduces the data processing speed.

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