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Ultra wide band linear equalizing method based on single bit quantization sampling

A technique of frequency domain linearity and equalization method, which is applied in the field of frequency domain equalization of ultra-wideband signals, can solve the problem that the matching receiver is not the optimal receiver, etc. Effects of Interpulse Interference

Inactive Publication Date: 2009-03-11
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, matched receivers are not optimal when the signal samples are quantized with single bits

Method used

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  • Ultra wide band linear equalizing method based on single bit quantization sampling
  • Ultra wide band linear equalizing method based on single bit quantization sampling
  • Ultra wide band linear equalizing method based on single bit quantization sampling

Examples

Experimental program
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Embodiment 1

[0021] attached figure 1 The implementation block diagram of the frequency domain linear equalization method based on 1-Bit quantized sampling reception in this embodiment is given. The implementation block diagram consists of an optional SNR estimator P10, two serial-to-parallel converters (S / P) a first serial-to-parallel converter P11 and a second serial-to-parallel converter P13, two fast Fourier transform (FFT ) the first Fourier transform processor P12 and the second Fourier transform processor P14, the frequency domain linear equalization processor P15, the inverse fast Fourier transform (IFFT) processor P16 and the third parallel-serial converter (P / S) P17 composition. Its working principle is: after the single-bit sampling sequence obtained from the 1-Bit sampler passes through the first serial-to-parallel converter P11 to form a data block, it is sent to the first Fourier transform processor P12 for Fourier transform to obtain the sample sequence of frequency-domai...

Embodiment 2

[0051] This embodiment is based on the UWB frequency-domain ZF equalization method based on 1-Bit quantized sampling reception, using signal-to-noise ratio information to obtain a frequency-domain MMSE equalization method to improve system performance.

[0052] attached figure 1 If the frequency-domain MMSE equalization method is adopted in the signal-to-noise ratio estimator P10 and the frequency-domain linear equalization processor P15, then the frequency-domain MMSE equalization method of this example is obtained.

[0053] The specific operation steps of the UWB frequency domain MMSE equalization method based on 1-Bit quantized sampling reception are as follows:

[0054] Steps 1, 2 and 3 are the same as the general frequency domain ZF equalization method in the above example.

[0055] Step 4, the SNR estimated by the joint SNR estimator P10 and the channel frequency domain coefficient H(k), use the above MMSE equalization method to obtain the minimum mean square error eq...

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Abstract

The invention discloses an ultra-wide-band frequency-domain linear equalization method based on single-bit quantification sampling, which is characterized in that: taking advantage of the property that the ultra-wide band channel has multiple paths, using the channel information at the receiver end, the frequency-domain linear equalization method corrects the distorted baseband receiving waveform so as to achieve the effect of linear equalization; on the basis of the previous step, the sequences in channel sequence frequency domain coefficients, the amplitude maximums of which are below -10 dB, are all forcefully set into -10dB, which is the amplitude maximum of the channel frequency-domain coefficients, the phases are unchanged, and an optimized frequency domain zero-approaching equalization method is obtained. Since single-bit quantification is adopted to receive signals, the complexity of the equalization process of the invention is low; at the same time, single-order frequency domain equalization process is adopted for reducing the complexity of equalization. In the environment of multipath fading channel, the energy of multipath signals is effectively collected by equalization process, and inter-symbol interference and inter-pulse interference are eliminated for approaching the performance of the optimal receiver.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to the frequency domain equalization technology of ultra-wideband signals. Background technique [0002] Ultra-Wideband (UWB for short) communication technology is an important technology for realizing high-speed wireless communication. Due to its strong multipath resolution ability, the number of multipaths is very large. As the information rate increases, Inter-Symbol Interference (ISI) or Inter-Pulse Interference (Inter-Pulse Interference: IPI) becomes more and more serious, so channel equalization technology is a key technology in ultra-wideband communication. [0003] In 1993, pages 447-450 of the anthology of the Military Communications Conference (IEEE Conference) of the International Institute of Electronics and Electrical Engineers first proposed the concept of pulse UWB with time-hopping multiple access. The United States "International Institu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/03H04B1/69H04B1/719
Inventor 符权尹华锐王卫东王俊徐佩霞
Owner UNIV OF SCI & TECH OF CHINA