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Multiple path multiple carrier digital pre-distortion sender of wideband CDMA base station system

A code division multiple access base station, digital predistortion technology, applied in code division multiplexing systems, multi-carrier systems, multi-frequency code systems, etc. High cost, improved transmit performance and efficiency, effect of saving RF link expenses

Active Publication Date: 2007-06-27
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a multi-channel multi-carrier frequency pre-distortion transmitter for wideband code division multiple access base station system, which can solve the non-linear problem caused by the memory effect in multi-carrier and multi-channel, signal The peak average is relatively high, etc.

Method used

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  • Multiple path multiple carrier digital pre-distortion sender of wideband CDMA base station system
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  • Multiple path multiple carrier digital pre-distortion sender of wideband CDMA base station system

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Embodiment Construction

[0024] The present invention will be described in further detail below in conjunction with accompanying drawing and embodiment:

[0025] As shown in Figure 3, the present invention comprises n-way multi-carrier baseband multiplexing signal processing channels, and each multi-carrier baseband multiplexing processing channel includes a baseband peak clipping up-conversion module, a digital predistortion processing module, an intermediate frequency output module (D / A converter) and filter, RF forward channel, high power amplifier (HPA); A / D converter, RF feedback channel, and feedback path share a switching control unit. The baseband peak-shaving up-conversion module accesses the transmitted baseband downlink IQ data, divides the carrier frequency after demultiplexing, performs digital shaping filtering, digital peak-shaving processing, and multi-carrier baseband digital combination to reduce the signal peak-to-average ratio. Digital up-conversion processing is required; the dig...

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Abstract

A multi-channel and multi-carrier Digital Predistortion writing machine of wideband CDMA base station system includes the feedback signal processing channels and at least one multiplexing signal processing channels of multi-carrier base band, of which, each includes the digital base-band peak-clipping frequency processor, digital predistortion processing module, high-intermediate frequency output module and filter, radio frequency access and high power amplifier. The feedback signal processing channel includes the RF feedback channel and A / D converter. The invention uses the base band peak-clipping technology, digital predistortion technology and high-intermediate digital IF technology, to reduce the high cost by the use of the linear power amplifier, and can effectively enhance the launch performance and efficiency of the base station system. The invention does not use the feedback channel switching technology to achieve saving the cost of RF link.

Description

technical field [0001] The invention belongs to the field of mobile communication, relates to a base station system transmitter, in particular to a broadband code division multiple access base station system multi-channel multi-carrier digital pre-distortion transmitter. Background technique [0002] The development of mobile communication technology is changing with each passing day. The 3G mobile communication system puts forward higher requirements for signal transmission technology. As an important part of the 3G mobile communication system, the performance of the transmitter has become an important factor affecting the performance, capacity and cost of the entire system. factor. [0003] For wideband code division multiple access base station systems, the peak-to-average ratio signal is likely to cause nonlinear distortion during the amplification process, resulting in degradation of communication signal quality. At present, the most widely used is the linearized trans...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/49H04L27/26H04L27/36H04J13/00
Inventor 张轶乾黄雄军陈长根吴宏星郑健
Owner ZTE CORP
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