Quadrature frequency-division and time-division transmitter, receiver and method thereof

A wireless transmitter and wireless receiver technology, applied in orthogonal multiplexing systems, baseband systems, digital transmission systems, etc., can solve the noise enhancement and diffusion of single-carrier receiving algorithms, without considering the adaptability of channel time-frequency characteristics , It is difficult to provide frequency domain diversity gain and other problems, to achieve the effect of wide mobile speed adaptability, low implementation complexity, and improved frequency shift robustness

Inactive Publication Date: 2008-06-18
SHANGHAI RES CENT FOR WIRELESS COMM +1
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Problems solved by technology

The implementation complexity of SC/FDE system is low (receiving end is based on FFT/IFFT transformation and single-point zero-forcing equalizer to complete frequency domain equalization), there are complete equalizer design criteria, signal peak-to-average ratio is not high, CP and data block length The design is relatively flexible, which is convenient for application in broadband wireless communication systems. However, the design of this scheme

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  • Quadrature frequency-division and time-division transmitter, receiver and method thereof
  • Quadrature frequency-division and time-division transmitter, receiver and method thereof
  • Quadrature frequency-division and time-division transmitter, receiver and method thereof

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[0036] The present invention will be described in detail below with reference to the drawings and in conjunction with specific embodiments. It should be understood that the present invention is not limited to specific embodiments.

[0037] Fig. 2 shows a block diagram of a wireless transmitter 1 for transmitting signals through multiple orthogonal carriers in a wireless communication network, especially a broadband mobile communication network, according to a specific embodiment of the present invention. It includes a channel coding device 11, a digital modulation device 12, a serial-to-parallel conversion device 13, an inverse Fourier (IDFT) transform device 14, a data block multiplexing device 15, a guard interval adding device 16, and a shaping filter device 17. An RF frequency conversion device 18 and a transmitting antenna 19.

[0038] It should be noted that the channel coding device, digital modulation device, shaping filter device, RF frequency conversion device, and trans...

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Abstract

Techniques are provided to support orthogonal multiple carriers frequency-time division multiplex based on orthogonal frequency division multiplex and single carrier with frequency domain equalization in prior art. At a transmitter end, Serial to Parallel Transform and Inverse Fast Fourier Transform are performed for the input serial data stream, then data blocks after IFFT are multiplexed to be a OFTDM symbol data part in temporal sequence; and then a circulation prefix is added in its front-part to form a final OFTDM symbol. At a receiver end, the CP in the front-part of the OFTDM symbol down-converted to a baseband is removed, and after the operations of data de-multiplex, FFT and P/S corresponding to the transmitter end are performed, the original serial data stream is recovered. Except for including the advantage of said prior art, this disclosure can overcome their disadvantage, and a preferable tradeoff between the general performance and complexity of the system can be acquired.

Description

Technical field [0001] The present invention relates to wireless communication technology, and more particularly, to a technology for transmitting signals through multiple orthogonal carriers in a wireless communication system. Background technique [0002] In wireless communication systems, especially in broadband mobile communication systems, air signal transmission technology is becoming the focus of research. In order to obtain higher, for example, up to 10bps / Hz, spectrum efficiency, support communication requirements in multiple scenarios, and support various adaptive control technologies, the signal transmission technology of broadband mobile communication systems must support more than any previous similar technology. Good performance while maintaining controllable implementation complexity. At present, the signal transmission technology of broadband mobile communication is mainly based on OFDM (Orthogonal Frequency Division Multiplexing) technology, and various variants ...

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Application Information

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IPC IPC(8): H04J11/00
CPCH04L27/2647H04L25/03159H04L27/2626
Inventor 张小东卜智勇周斌李明齐杨秀梅周平
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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