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Calculating method for linear fusion phase discriminator

An arithmetic method and linear fusion technology, which can be used in instruments, radio transmission systems, radio wave measurement systems, etc., and can solve the problems of channel noise estimation error analysis, noise sensitivity of digital phase detectors, etc.

Inactive Publication Date: 2009-04-29
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, digital phase detectors are sensitive to noise, and their performance degrades quickly in the case of low signal-to-noise ratio. [7] , the estimation error caused by channel noise was not analyzed in literature [7]

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  • Calculating method for linear fusion phase discriminator
  • Calculating method for linear fusion phase discriminator
  • Calculating method for linear fusion phase discriminator

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Experimental program
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Embodiment Construction

[0047] The block diagram of the 1-bit software receiver using the linear fusion phase detector computing method of the present invention is as figure 1 As shown, its working principle is as follows:

[0048] 1. After the data sent by the transmitter undergoes large-scale fading, it is superimposed with Gaussian white noise and enters the receiver;

[0049] 2. The analog front-end amplifies and filters the received RF signal, implements down-conversion to an intermediate frequency signal, and uses 1-bitADC to sample the intermediate frequency signal, and transmits the sampled data to the subsequent digital terminal;

[0050] 3. The numerically controlled oscillator (NCO) in the digital receiver generates local I and Q two-way intermediate frequency carrier signals, which are non-coherently demodulated with the sampled data, and the demodulated I and Q two-way data are respectively integrated, and the The integral result is sent to the following digital phase-locked loop;

[005...

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Abstract

The present invention relates to an operation method applied for the phase discriminator of 1-bit quantized software receiver, which uses an iterative method for analyzing and calculating the error of phase estimation. Compared with the traditional phase discriminator based on inverse tangent calculation, the operation method of the phase discriminator provided by the invention avoids the inverse tangent calculation, reduces the calculation complexity, and at the same time provides a precision better than the inverse tangent phase discriminator, the phase discriminator provided by the operation method according to the invention overcomes the disadvantage of severe deterioration at the environment of low signal-to-noise ratio, and has excellent precision at the environment of low signal-to-noise ratio. The phase discriminator provided by the invention can be excellently applied to the 1-bit quantized software receiver.

Description

technical field [0001] The invention belongs to the technical field of wireless communication software receivers, and in particular relates to an operation method of a linear fusion phase detector in a 1-bit quantization software receiver. Background technique [0002] 1-bit analog-to-digital converter (ADC) is widely used in low-cost GPS software receivers and low-power satellite communications due to its simple structure and no need for automatic gain controller (AGC) assistance [1-4] . In the phase of carrier synchronization, the general receiver usually uses the phase detector (APD) based on the arc tangent (arctan) operation to perform non-coherent phase detection, so as to achieve the maximum signal-to-noise ratio in the additive Gaussian (AWGN) channel environment [5] . The arc tangent operation needs a considerable amount of calculation when it is implemented, so in the actual system, some improved phase detectors have been proposed to reduce the amount of calculat...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L7/033H04B7/185G01S5/14
Inventor 赵晋张建秋
Owner FUDAN UNIV