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Improved dual carrier demodulation method based on mixed decision

A demodulation method and dual-carrier modulation technology, applied in the field of ultra-wideband

Inactive Publication Date: 2013-07-17
FUDAN UNIV
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Problems solved by technology

[0007] The purpose of the present invention is to propose a low complexity, high-performance improved dual-carrier demodulation method, to improve the performance based on linear demodulation methods and the lack of hardware complexity based on maximum likelihood demodulation

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  • Improved dual carrier demodulation method based on mixed decision
  • Improved dual carrier demodulation method based on mixed decision
  • Improved dual carrier demodulation method based on mixed decision

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Embodiment Construction

[0060] Attached below figure 1 - attached Figure 6 The algorithm proposed by the present invention is further described in detail.

[0061] refer to figure 1 , the invention is used for demodulation of MDCM modulation in a DC-OFDM UWB wireless communication system. The interleaved original symbol stream enters this module in units of 400 bits, and after serial-to-parallel conversion, the continuous 8-bit stream is divided into 50 groups. It is used for MDCM mapping modulation to the corresponding constellation pattern.

[0062] refer to figure 2 , according to the MDCM symbol generation method specified in literature [2], each group of continuous 8-bit channel symbols is divided into figure 2 The two parts shown are 4 bits each, respectively mapped according to the 16QAM constellation pattern coded by Gray, and mapped into two 16QAM symbols. The generated QAM symbol pairs pass through the MDCM precoded orthogonal matrix, and are mapped to MDCM symbols according to two...

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Abstract

The invention belongs to the technical field of ultra wide band and particularly relates to an improved dual carrier demodulation method based on mixed decision. A constellation demapping method based on the mixed decision is adopted, compared with the existing hard decision method, demodulation performance near the maximum likelihood method is kept, and simultaneously the computation complexity is greatly reduced. The improved dual carrier demodulation method is provided for supporting rate higher than 480 Mbps of a follow-up physical layer protocol and provides the constellation demapping method based on improved dual carrier. The improved dual carrier demodulation method can be applicable to a dual carrier orthogonal frequency division multiplexing ultra wide band system defined by a China national wireless high-speed ultra wide band media access control and physical layer standard (standard number GB / T26229-2010).

Description

technical field [0001] The invention belongs to the field of ultra-wideband technology, and in particular relates to a demodulation method suitable for improved dual-carrier modulation (MDCM) in a dual-carrier orthogonal frequency division ultra-wideband (DC-OFDM UWB) system, which can effectively reduce the cost of constellation demapping Computational complexity. Background technique [0002] At present, short-distance wireless communication technology has entered an unprecedented development period. With the improvement of living standards, people put forward higher and higher requirements for the transmission rate of wireless communication systems, such as: wireless high-definition video transmission, high-speed download of massive files, etc. Spectrum resource is the most precious and scarce resource in wireless communication. How to improve the effective utilization of spectrum is a key topic in the field of wireless communication. [0003] As a potential high-speed,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04L27/34
Inventor 叶凡薛元坤井冰任俊彦
Owner FUDAN UNIV