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Six-band frequency synthesizer for OFDM UWB

A frequency synthesizer, six-band technology, applied in multi-frequency code system, multiplexing communication, orthogonal multiplexing system, etc. Frequency hopping speed, low cost effect

Inactive Publication Date: 2009-07-01
SHENYANG ZHONGKE MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Based on the above difficulties, the traditional phase-locked loop frequency synthesizer has been unable to meet the requirements of the UWB communication system

Method used

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  • Six-band frequency synthesizer for OFDM UWB

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Embodiment Construction

[0030] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0031] Such as figure 1 as shown, figure 1 It is a structural block diagram of a six-band frequency synthesizer for OFDM UWB provided by the present invention, and the frequency synthesizer includes a first fixed-frequency phase-locked loop 1, a second fixed-frequency phase-locked loop 2, a first multiplexer 3, A first SSB mixer 4 , a second SSB mixer 5 and a second multiplexer 6 .

[0032] Among them, the first fixed-frequency phase-locked loop 1, the first fixed-frequency phase-locked loop uses the 66MHz signal as the reference frequency signal, and the feedback link includes two frequency dividers by 2 and a frequency divider by 17 in turn, and outputs stable The 4488MHz quadrature signal is sent to the first single ...

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Abstract

The invention discloses a six-band frequency synthesizer for an orthogonal frequency division multiplexing ultra wideband (OFDM UWB), which comprises a first fixed-frequency phase lock loop (1), a second fixed-frequency phase lock loop (2), a first multi-way selector (3), a first single side-band frequency mixer (4), a second side-band frequency mixer (5), and a second multi-way selector (6). The frequency synthesizer can output a local oscillation signal with six bands (4,488 MHz, 6,600 MHz, 7,128 MHz, 7,656 MHz, 8,184 MHz and 8,712 MHz) by adopting a direct frequency synthesis technique, and the frequency hopping time among bands is in the magnitude of nanosecond, so as to meet the rapid frequency hopping requirement of an OFDM UWB communication system.

Description

technical field [0001] The invention relates to the technical field of Orthogonal Frequency Division Multiplexing (OFDM) wireless ultra-wideband (UWB), in particular to a six-band frequency synthesizer for OFDM UWB. Background technique [0002] UWB technology is mainly used to realize short-distance, ultra-high-speed wireless communication, and its transmission distance is generally within 10m at present, and the transmission rate can reach 480M / s or even higher. The characteristics of UWB's high transmission rate, low power consumption and no interference with existing wireless systems make UWB a hot spot now and in the next five years. [0003] UWB technology has achieved two major breakthroughs. In terms of spectrum division, it has created a "coexistence" situation; in terms of transmission speed, it has truly moved towards high speed. It increases capacity by increasing bandwidth and becomes an important part of the "high-speed" revolution in wireless technology. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/26H04J11/00
Inventor 李志强张海英
Owner SHENYANG ZHONGKE MICROELECTRONICS