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Transmitter based on multiple M dimension parallel modulaticn communication mode

A communication method and transmitter technology, applied in the field of transmitters, can solve the problems that quasi-orthogonal codewords have not been seen in CDMA communication systems, etc.

Inactive Publication Date: 2005-05-25
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, the quasi-orthogonal codewords constructed by this method have not been seen in CDMA communication systems using M-ary modulation.

Method used

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  • Transmitter based on multiple M dimension parallel modulaticn communication mode
  • Transmitter based on multiple M dimension parallel modulaticn communication mode
  • Transmitter based on multiple M dimension parallel modulaticn communication mode

Examples

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Embodiment 1

[0020] In this embodiment, combined with the designed frame structure of the uplink, the uplink dedicated channel is divided into a dedicated physical data channel (Dedicated Physical Data Channel, DPDCH for short) carrying a data flow and a dedicated physical control channel (Dedicated Physical Data Channel) carrying a control information flow. Control Channel), because DPDCH requires high-speed transmission, and the transmission rate of DPCCH is relatively low, so, in the specific implementation, the transmitter structure of the MM-aryM method is as follows figure 1shown. In the figure, the data flow 1 first passes through the splitter 3 and is divided into several paths. For each path of data, a part passes through the common modulator Mi (i=1,...n), and the number of bits thereof is the same as the modulation method adopted by Mi Correlation, as corresponding to quaternary phase shift keying, the number of bits passing through modulator Mi is 2 bits; The number of codewor...

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Abstract

Said invention is based on a transmitter of M-ary parallel communication mode, which is characterized by combining M-ary modulation mode with traditional binary phase shift keying, quaternary phase shift keying and quadrature amplitude modulation, dividing data stream into multiplex parallel modulation, in each path, part of data is modulated by M-ary mode and part of data is modulated by traditional modulation mode, using quasi-orthogonal code character to construct as more as possible quasi-orthogonal code character, making optimal grouping, to raise demodulation property.

Description

Technical field: [0001] The invention belongs to the technical field of modulation in mobile communication, and particularly relates to a transmitter combining a parallel M-dimensional (M-ary) modulation mode with a block orthogonal code set as a spreading code set and traditional modulation technology. Background technique: [0002] With the development of mobile communication technology, the number of users of the mobile communication system is constantly increasing, and the service rate required by the users is also constantly increasing. The emergence of the third-generation mobile communication system has greatly improved the data transmission rate, making high-speed data transmission possible. However, with the continuous increase of user demands, the rate still becomes the bottleneck of high-speed data services. [0003] The book "Wireless Communication: Principles & Practice" (Wireless Communication: Principles & Practice) published by Electronics Industry Press in ...

Claims

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Application Information

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IPC IPC(8): H04B1/02H04J13/02
Inventor 朱近康李凡朱有团张磊
Owner UNIV OF SCI & TECH OF CHINA
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