Multi-carrier implementing method and apparatus for TD-SCDMA system

A code division multiple access and time division synchronization technology, applied in multi-frequency code systems, baseband system components, and shaping networks in transmitters/receivers, etc., can solve problems such as cost increase, achieve cost control and reduce investment Effect

Active Publication Date: 2011-06-08
BEIJING STARPOINT TECH COMPANY +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] However, in the prior art, multi-carriers are usually implemented through multiple independent radio frequencies, resulting in an increase in cost

Method used

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  • Multi-carrier implementing method and apparatus for TD-SCDMA system
  • Multi-carrier implementing method and apparatus for TD-SCDMA system
  • Multi-carrier implementing method and apparatus for TD-SCDMA system

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Embodiment Construction

[0026] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated.

[0027] figure 1 It is a schematic diagram of a signal processing device of a base station in a TD-SCDMA system. like figure 1 As shown, the device includes a baseband board 10 , a radio frequency board 11 and a main controller 12 . The baseband board 10 includes a digital signal processor (Digital Signal Processing, DSP) and a field programmable gate array (Field Programmable Gate Array, FPGA). The main controller 12 includes high-level protocol stacks and drivers. These devices work together to process downlink and uplink signals.

[0028] When processing the downlink signal, the digital signal processor is used to modulate the downlink single-speed time-domain signal into a frequency-domain signal through fast Fourier transform, perform spectrum shift and root-raised cosine filtering on the f...

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Abstract

The invention discloses a multi-carrier accomplishing method and device of time-division synchronization code division multiple access system. The method comprises: modulating downlink single speed time domain signal to frequency domain signal through quick Fourier transform, performing spectrum shift and rooted raised cosine filter for frequency domain signal, then performing reverse quick Fourier transform to produce downlink N carrier time domain signal, interpolating the downlink N carrier time domain signal to produce K speed signal then low pass filtering. The inventive TD-SCDMA multi-carrier accomplishes combination on DSP, so a radio frequency can accomplish multi-carrier function. Multi-carrier filtering separately accomplish on DSP and FPGA, DSP can accomplish RRC filtering, FPGA can accomplish low pass filtering. Transmission time delay controls digital signal and continuous phase of frequency domain which enables high precision algorithm and low complexity.

Description

technical field [0001] The present invention relates to the technical field of Time Division-Synchronous Code Division Multiple Access (TD-SCDMA) mobile communication, in particular to a method and device for realizing multi-carrier of TD-SCDMA system. Background technique [0002] The TD-SCDMA standard is one of the mainstream standards of the third generation (3G) mobile communication in the world. The TD-SCDMA system adopts technologies such as smart antenna, joint detection, uplink synchronization, and power control, and is a Low Chip Rate 3G system in TDD mode. Based on the unique technical characteristics of TD-SCDMA technology, a carrier bandwidth of TD-SCDMA system only occupies 1.6MHz, which has a high spectrum utilization rate, which can not only meet the needs of voice services, but also flexibly adapt to the asymmetry of uplink and downlink Data and multimedia business needs. At the same time, it can also be applied to various urban and suburban environments su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L25/03
Inventor 李亦农张平张治姜军邓钢唐晓晟陈杰廖昕
Owner BEIJING STARPOINT TECH COMPANY
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