Equalizing system and method for changing block length of batch data block
A balanced system, batch processing technology, applied in the direction of baseband system components and other directions
Inactive Publication Date: 2012-05-30
INST OF ACOUSTICS CHINESE ACAD OF SCI
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[0004] In order to overcome the defects of the prior art variable step size batch processing LMS algorithm and variable block length batch processing LMS algorithm, the present invention provides an equalization system and method for changing the block length of batch processing data
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[0113] Applying an equalization system for changing the length of batch data blocks provided by the present invention to a single-carrier frequency domain equalization system, the structure is as follows image 3 shown.
[0114] The overall structure of the balanced system that changes the length of the batch data block is as follows: Figure 4 As shown, it includes: a batch processing module, which is used to divide the received time domain input signal into blocks to form a batch processing data block; a pre-transformation module, which is used to convert the length and The time-domain input signal with the same length of the data block is sequentially combined with the data block to form a pre-transformed data block; a frequency-domain output signal module is used to perform fast Fourier transform on the pre-transformed data block, and output the frequency-domain signal by calculation ; a time-domain output signal module, used to perform fast inverse Fourier transform on t...
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The invention relates to an equalization system and a method for changing the length of batch-processing data block. The equalization system comprises a batch processing module, a pre-transformation module, a frequency domain output signal module, a time domain output signal module, a batch-processing data block length transformation module and a frequency domain weight coefficient transformation module. The equalization method comprises the following steps: updating the length(R) Lk+1of the (k+1) batch-processing data block according to a block length change decision factor deltL; and updating the frequency domain weight coefficient W(k+1) according to the updated length Lk+1 of the batch-processing data block, wherein the updated frequency domain weight coefficient includes a primary updated frequency domain weight coefficient W'(k+1) and a secondary updated frequency domain weight coefficient W(k+1). The equalization system has the advantages of less computation amount and high speed, and can be used for systems with high real-time requirement. The method can find an equilibrium point between the convergent speed and the steady state error conflicting to each other, and can achieve the application of variable block length in the engineering aspect.
Description
technical field [0001] The invention belongs to the technical field of equalization in wireless communication systems, and in particular relates to an equalization system and method for changing the block length of batch processing data. Background technique [0002] In order to adapt to the future development, the wireless communication system must be able to support the transmission of high-speed data. This will inevitably encounter problems such as frequency selective fading channel and multipath interference. In order to compensate for transmission distortion, an equalizer can generally be used at the receiving end to generate characteristics opposite to the channel characteristics to compensate for errors caused by frequency selective fading and multipath interference in the transmission channel. figure 1 It is a structural diagram of a basic single-carrier frequency domain equalization system in the prior art, figure 2 It is a flow chart of frequency-domain batch pr...
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IPC IPC(8): H04L25/02
Inventor 曾学文杨群肖琳刘马飞王劲林
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI