A baseband data transmission apparatus and frame synchronization method thereof

Abstract

The invention relates to a base band data transmission installation and its frame synchronization method. It includes framing machine, serializer, deserialiser, deframing machine, synchronizing frame inserting controller. The serializer and the deserialiser are physically connected by low pressure high speed differential line. The framing machine is used to form the user data to user data frame with the same length. Meanwhile, the synchronizing frame inserting controller inserted synchronizing frame to free frame position periodically, the user data frame and the synchronizing frame are formed to parallel data. The serializer transforms the parallel data after framing to serial data by coding, and transforms to differential signal and transmits out by the low pressure high speed differential line. After the deserialiser transforms the received differential signal to single end signal, the serial data will be transformed to parallel data. The deframing machine finds the frame boundary according to the frame synchronization information contained in the received parallel data, then, each of the received frame data will be distributed to the after stage unit to use. The advantage of the installation and method of the invention is that the band width took up is small, the transmission efficiency is high, and the cost of the frame synchronization is reduced.

Description

technical field [0001] The invention relates to a baseband data transmission device and a transmission method thereof, in particular to a TD-SCDMA base station internal baseband data transmission device and a frame synchronous transmission method thereof. Background technique [0002] The base station transceiver used in the wireless communication system can generally be divided into two functional units: a radio frequency transceiver unit 2 (RFU) and a baseband processing unit 3 (BPU). The schematic diagram is shown in Figure 1. These two units 2, 3 need to carry out data transmission: the BPU sends the downlink baseband digital I / Q and data 32 (24) to the signaling unit 22 of the RFU, and the signaling unit 22 performs quadrature modulation, digital-to-analog conversion, Mixing, filtering and amplification, and other processing, and finally the output radio frequency signal is sent out through the antenna; the receiving unit 21 of the RFU performs down-filtering, amplifica...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a device for baseband data transmission and a frame synchronization method, which overcomes the shortcomings of high-speed baseband data transmission frame synchronization in the prior art, which occupy a large bandwidth and low transmission rate, and at the same time solve the problems existing in the prior art. The problem of high cost of frame synchronization

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