Frequency synthesizer used for 6 to 9 GHz dual-carrier orthogonal frequency division multiplexing ultra-wide band

A technology of frequency synthesizer and orthogonal frequency division, which is applied in the field of broadband RF communication, can solve the problems that frequency synthesizers are rarely mentioned, reduce design complexity and difficulty, avoid traction utility, reduce implementation difficulty and cost Effect

Inactive Publication Date: 2011-06-22
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no reports on the realization of DC-OFDM UWB frequency synthesizers in the industry and academia, especially the frequency synthesizers used in DC-OFDM UWB double-conversion zero-IF transceivers are rarely mentioned.

Method used

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  • Frequency synthesizer used for 6 to 9 GHz dual-carrier orthogonal frequency division multiplexing ultra-wide band
  • Frequency synthesizer used for 6 to 9 GHz dual-carrier orthogonal frequency division multiplexing ultra-wide band
  • Frequency synthesizer used for 6 to 9 GHz dual-carrier orthogonal frequency division multiplexing ultra-wide band

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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0032] figure 1 Shown is the allocation diagram of the carrier frequency for DC-OFDM UWB of 6 to 9 GHz provided by the present invention. As can be seen from the figure, the frequency band from 6204MHz to 8316MHz is divided into eight sub-bands with a width of 264MHz. ). In order to obtain the above-mentioned center frequency, the present invention particularly selects a lower carrier frequency as 1320MHz (i.e. f 0 ), so that eight frequencies (7656, 7920, 8184, 8448, 8712, 8976, 9240, 9504) (in MHz) need to be generated, and the corresponding image signal falls between 8976MHz and 10824MHz.

[0033]The frequency synthesizer for 6 to 9GHz dual-carrier OFDM ultra-wideband provided by the present invention includes a pha...

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Abstract

The invention discloses a frequency synthesizer used for a 6 to 9 GHz dual-carrier orthogonal frequency division multiplexing ultra-wide band (DC-OFDM UWB). The frequency synthesizer comprises a phase-locked loop, a first multiplexer, a second multiplexer, a third multiplexer, a first single sideband frequency mixer, a second single sideband frequency mixer, a third single sideband frequency mixer, a fourth single sideband frequency mixer and a divide-by-2 frequency divider, and is used for generating eight pairs of carrier components and an orthogonal carrier component used for 6 to 9 GHz DC-OFDM UWB communication. The frequency synthesizer has a simple structure, a small area and low power consumption, only comprises a phase-locked loop (avoids a traction effect of a plurality of phase-locked loops), obtains more stable frequency, improves the frequency and the frequency hopping speed of the frequency synthesizer, and meets a requirement on a DC-OFDM UWB communication system.

Description

technical field [0001] The invention relates to the technical field of broadband RF communication, in particular to a frequency synthesizer based on dual-carrier orthogonal frequency division multiplexing ultra-wideband wireless communication. Background technique [0002] Ultra-wideband (Ultra-Wide band, 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 480Mb / 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] A multi-band orthogonal frequency division multiplexing (Multi-Band Orthogonal Frequency Division Multiplexing, MB-OFDM) scheme is one of the main implementation schemes for high-speed ultra-wideband communication at present. The MB-OFDM standard stipulates that an OFD...

Claims

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Application Information

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IPC IPC(8): H03L7/18H04B1/7163H04L27/26
Inventor 陈普锋张海英
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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