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Downgoing baseband processing unit of WCDMA system

A baseband processing device and wideband code division multiple access technology, applied in the direction of code division multiplexing system, selection device, multiplexing communication, etc., can solve the problems of resource idle power, rising maintenance cost, poor system reliability, etc. , to achieve the effect of single function, saving production and maintenance costs, and improving work efficiency

Inactive Publication Date: 2003-12-31
ALCATEL LUCENT SHANGHAI BELL CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Although the control of this device is relatively simple, since the number of channels is directly proportional to the complexity of the system, if the base station is not in a full-load working state, resources will inevitably be idle and power will be wasted.
In addition, the structure is rigid and difficult to expand, resulting in increased maintenance costs; the control is not centralized enough, and the system reliability is poor

Method used

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  • Downgoing baseband processing unit of WCDMA system
  • Downgoing baseband processing unit of WCDMA system
  • Downgoing baseband processing unit of WCDMA system

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Embodiment Construction

[0013] see figure 2 , the device of the present invention is driven by the message control and data of the base station / sector controller, wherein the control message includes sending system state control message and channel configuration parameter message, and the transmitted data is mainly the traffic channel data to be sent. The downlink baseband processing device performs baseband processing (including symbol-level and chip-level processing) on ​​the business data required for transmission according to the requirements of the control message, and then converts it into an analog signal and sends it to the front end of the base station transmitter for intermediate frequency and radio frequency processing. and antenna feeder launch. According to the processing capacity requirement (delay, throughput, etc.), the type and characteristics of the processed object, the baseband downlink processing device is divided into the main control unit 201, the symbol level processing unit ...

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Abstract

A broad band code division multiple access (CDMA) system downward baseband processing apparatus comprising, a main control unit for base station control message processing and providing remote management interface, a symbol level processing unit for completing the symbol level processing of the business data, including data partitioning, circulation redundant code check interpolation, convolution or encoding, data interleaving, code rate matching, organizing the data from the base station / sector controller into the mode and sequence suitable for transmission, a memory for storing the data of each channel that has been formatted output from the symbol level processing unit through address mapping, code sheet level processing unit for fulfilling the processing of channel data frequency expanding, interfere adding, gain control, channel combination and forming filtration. Finally the processed result is converted to analog signal to be fed to the transmitter front end. The invention improves the system controllability, dependability and expandability.

Description

technical field [0001] The invention relates to a wideband code division multiple access (WCDMA) communication system, in particular to a base station baseband processing device of the wideband code division multiple access mobile communication system. Background technique [0002] According to the description of the wideband code division multiple access W-CDMA system specification (3G TS 25.211-215) formulated by the third-generation mobile communication partner 3GPP organization under the ITU ITU, the downlink (base station to mobile station) baseband processing device should complete including coding Complex functions such as multiplexing, physical channel mapping, spread spectrum modulation, gain control, baseband shaping filtering, etc. need to support multiple special functions such as transmit diversity, open / closed loop transmit power control, variable rate channel processing, and compression mode. [0003] The existing wideband code division multiple access W-CDMA ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J13/00
Inventor 吴素芳刘斌郭正福史庆波曹鹏志
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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