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Transmitter and receiver of arbitrary access front signal

A random access preamble and transmitter technology, applied in the direction of diversity/multi-antenna system, time division multiplexing usage, etc., can solve the problem of difficult implementation of single carrier time domain equalizer, reduce system access delay, reduce access input delay and improve spectral efficiency

Inactive Publication Date: 2008-01-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the complexity of the single-carrier time-domain equalizer is proportional to the cubic increase in the maximum delay of the channel, so the single-carrier time-domain equalizer is difficult to implement in some practical applications

Method used

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  • Transmitter and receiver of arbitrary access front signal
  • Transmitter and receiver of arbitrary access front signal
  • Transmitter and receiver of arbitrary access front signal

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Experimental program
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Embodiment Construction

[0018] As shown in FIG. 1 , it is a RACH (Random access channel) burst time slot cycle structure. The RACH burst takes a time slot (subframe) as a unit, which is 0.5ms in this embodiment, and is transmitted periodically, and the period is a multiple of 0.5ms, which can be 10ms, 5ms and other typical applications. The RACH burst mainly carries the random access burst (burst) in the time slot (subframe), and an appropriate time guard band is left before and after the random access burst to avoid overlapping of the front and rear time slots due to asynchronous reasons . Generally, the pre-time guard band is short, such as 5us, and the post-time guard band is wide, such as 100us. The random access burst is the preamble signature, but a small amount of additional information bits are implied in the preamble signature, and this information bit may be an important control information bit.

[0019] As shown in FIG. 2 , it is a structural diagram of RACH random access burst generatio...

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Abstract

The invention discloses an emitter and a receiver for randomly accessing front signal, wherein the emitter comprises a CCSK sequence emitter, a front sign sequence generator and an accumulator. A CCSK sequence generated by the CCSK sequence generator and a front sign sequence generated by the front sign sequence generator are added by the accumulator to be emitted. The receiver comprises a front sign sequence generator, a frequency domain CCSk sequence generator, a synchronous checker, a first threshold value comparer, a second threshold value comparer, a DFT transformer, a first correlate device, and a second correlate device. The invention can realize emission ascending synchronization timing, frequency reference signal, and hidden information bit transmission, which effectively improve the frequency spectrum efficiency randomly accessed and reduce access time delay.

Description

technical field [0001] The present invention relates to a mobile communication system, in particular to a system for transmitting and receiving random access signals in the field of mobile communication. Background technique [0002] The data transmission rate required by the future mobile communication system will be as high as 100Mbit / s, and the supported services will also be extended from voice services to multimedia services (including real-time streaming media services). Technologies that can achieve high speed and large capacity on limited spectrum resources have become a hot research topic at present. Broadband mobile communication systems usually suffer from frequency selectivity of the channel. The so-called frequency selectivity of the channel is that the attenuation of the channel is different at different frequencies. Frequency selective channels usually cause severe intersymbol interference (ISI), intercarrier interference (ICI) and multiple access interferen...

Claims

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Application Information

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IPC IPC(8): H04L5/24H04B7/02
Inventor 张峻峰胡学斌温杨张忠培
Owner ZTE CORP