Low-stray rapid-frequency-hopping frequency synthesizer and fast frequency hopping method applying same

A technology of frequency hopping and synthesizer, applied in the direction of automatic power control, electrical components, etc., can solve the problems of increasing circuit area and power consumption, and achieve the effect of reducing stray signals

Inactive Publication Date: 2012-11-21
PANOVEL TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, multiple phase-locked loops contain multiple oscillators and loop filters, which will greatly increase the area and power consumption of the circuit

Method used

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  • Low-stray rapid-frequency-hopping frequency synthesizer and fast frequency hopping method applying same
  • Low-stray rapid-frequency-hopping frequency synthesizer and fast frequency hopping method applying same
  • Low-stray rapid-frequency-hopping frequency synthesizer and fast frequency hopping method applying same

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Embodiment Construction

[0021] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] figure 1 A schematic diagram of a low spurious fast frequency hopping frequency synthesizer according to a preferred embodiment of the present invention is shown. exist figure 1 In the shown embodiment, the low spurious fast frequency hopping frequency synthesizer of the present invention mainly includes: a single phase-locked loop 101, a plurality of frequency dividers 102-1~102-5, a mixer 103, a gate 104 and polyphase filter 106 .

[0023] According to the invention, only a single phase-locked loop 101 is required, which only needs to generate a signal of a fixed frequency. exist figure 1 Among them, frequency dividers 102-1 to 102-5 are sequentially cascaded after the phase-locked loop 101, so as to generate signals of different frequencies. In particular, according to a preferred embodiment of the present invention, the frequency dividers 1...

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Abstract

The invention provides a low-stray rapid-frequency-hopping frequency synthesizer, comprising a single phase-locked ring, a frequency mixer and a gating device, wherein the single phase-locked ring is used for generating a signal with a fixed frequency; multiple frequency dividers for generating signals with different frequencies after being cascade connected to the phase-locked ring, wherein the signals with different frequencies have orthorhombic I and Q components; the signals generated by one part of multiple frequency dividers are input into the frequency mixer, so that a local oscillator signal is generated; and the rest parts of the frequency dividers are mutually connnected to the frequency mixer, and are used for selecting the required frequency. Moreover, the invention also provides a fast frequency hopping method which can be applied to the low-stray rapid-frequency-hopping frequency synthesizer.

Description

technical field [0001] The invention relates to a frequency synthesis technology in a radio frequency transceiver, in particular to a low stray fast frequency hopping frequency synthesizer and a fast frequency hopping method applied thereto. Background technique [0002] Recently, research on Orthogonal Frequency Division Multiplexing (OFDM), which is useful for high-speed data transmission through wireless channels, is actively being conducted in the field of wireless communication systems. OFDM, a scheme for transmitting data using multiple carriers, is a type of multicarrier modulation that converts a stream of serial input symbols into parallel symbols before transmission and modulates each symbol with multiple orthogonal subcarriers, such as subcarrier channels. [0003] In the field of broadband wireless communication, such as ultra-wideband systems based on MB-OFDM technology, fast frequency hopping frequency synthesizers are being widely used. In particular, in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/18
Inventor 孔维新
Owner PANOVEL TECH CORP
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