Wireless frequency-domain multi-channel communications

A multi-channel, channel signal technology, applied in the field of wireless digital communication, can solve the problems that the available frequency band cannot be fully utilized, wireless digital communication devices cannot reach, converters/filters cannot work, etc.

Active Publication Date: 2009-11-04
COMMONWEALTH SCI & IND RES ORG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The practical difficulty is that wireless digital communication devices cannot reach such a high frequency
On the other hand, in the analog domain, real analog-to-digital (A/D) converters/filters and digital-to-analog (D/A) converters/filters cannot ope

Method used

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  • Wireless frequency-domain multi-channel communications
  • Wireless frequency-domain multi-channel communications
  • Wireless frequency-domain multi-channel communications

Examples

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Embodiment Construction

[0034] introduction

[0035] The described embodiments are applicable to the microwave and millimeter wave portions of the radio spectrum, but it will be appreciated that the invention has practical utility at frequencies below and above these ranges. A common requirement for all these operating frequencies is that the usable frequency bandwidth is greater than the Nyquist spectral width of the associated analog-to-digital or digital-to-analog converter used.

[0036] The high-spectrum-efficient wireless communication system of several gigabits per second in the preferred embodiment of the present invention is a kind of two-way point-to-point wireless system, and it adopts the frequency domain multiplexing that does not have guard frequency band, multiple (N) (high-speed ) digital channels (each channel occupies a bandwidth BWo) are multiplexed into a single radio frequency channel with a bandwidth of N*BWo. This digital modulation enables spectral efficiencies greater than 1...

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Abstract

The present invention discloses a circuit for transmission and reception of multi-channel communications. The transmitter path includes a digital modulation circuit receiving multiple channel binary data, and for each channel generating a digital representation of the data. A digital-to-analogue (D/A) conversion circuit (140-146) is provided for each data channel. Each D/A conversion circuit receives and converts respective channel digital representations to produce a resultant band limited analogue signal (148-154). The band limitation arises due to a characteristic of said channel digital representations. A bandpass filter (156-162) receives and filters each analogue channel signal. The band width to the start of the stop band of each bandpass filter is wider than a respective band limited analogue channel signal and wider than the Nyquist bandwidth arising from the sampling rate of said D/A conversion circuit. In this way, signal power in unwanted Nyquist zones is effectively removed. A frequency translation circuit (172-188) abuts the multiple channel bandpass filtered analogue signals in the frequency domain without any guard bands between adjacent channel signals.

Description

technical field [0001] The present invention relates to wireless digital communications. In particular, the present invention relates to frequency domain multi-channel communication. Background technique [0002] Multi-gigabit wireless communication at millimeter wave frequencies is emerging as an important technology for future ubiquitous communication networks. This is due in part to ever-increasing bandwidth demands and scarcity of wireless spectrum, and in part to the falling cost of millimeter-wave monolithic integrated circuits (MMICs), making transmitting and receiving devices ever cheaper to produce. [0003] While well-known fiber optic data transmission devices are capable of delivering multi-gigabit per second (Gbps) data rates, the infrastructure is costly and takes years to deploy. Wireless alternatives are attractive because of their low cost and rapid deployment. Currently, commercial mmWave devices are focused on 60GHz wireless personal area network (WPAN)...

Claims

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Application Information

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IPC IPC(8): H04B1/04H04B1/06H04L27/26
CPCH04L5/0007H04L27/2637H04L2027/0024H04L27/0014H04L2027/0067H04L25/03834H04L27/2653H04B1/0483
Inventor B·M·默里D·A·阿博特J·A·保蒂库兰格拉J·本顿V·佳久科
Owner COMMONWEALTH SCI & IND RES ORG
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