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Analog baseband link of radio-frequency receiver compatible with ultra wide band international standard and Chinese standard

A radio frequency receiver, a Chinese standard technology, applied in electrical components, transmission systems, etc., to achieve the effect of reducing costs, realizing reconfigurable design, and strong application significance

Inactive Publication Date: 2013-01-02
FUDAN UNIV
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AI Technical Summary

Problems solved by technology

As for the ultra-wideband Chinese standard, no domestic unit has proposed a chip solution, and designing a UWB transceiver chip compatible with the UWB international standard and the Chinese standard is a very important research direction

Method used

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  • Analog baseband link of radio-frequency receiver compatible with ultra wide band international standard and Chinese standard
  • Analog baseband link of radio-frequency receiver compatible with ultra wide band international standard and Chinese standard
  • Analog baseband link of radio-frequency receiver compatible with ultra wide band international standard and Chinese standard

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Embodiment Construction

[0016] The following is a description combined with a specific circuit diagram:

[0017] figure 2 It is the link architecture of the entire analog baseband link, where the gain of the pre-amplifier is variable from -2dB to 10dB, and the gain step is 6dB. The cut-off frequency of the low-pass filter can be switched between 132MHz and 264MHz according to the applied standard, and its passband gain can be changed from 0dB to 30dB. The gain step size is 6dB. Finally, the programmable gain amplifier can realize variable gain from -2 to 20dB, and the gain step size is 2dB.

[0018] image 3 It is the specific structure of the pre-amplifier and the programmable gain amplifier. This structure adopts a transconductance structure with local negative feedback, which converts the input voltage into a current and generates a voltage on the load resistance to achieve gain. Through local negative feedback, the loop gain is increased, making the transconductance more constant. The transc...

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Abstract

The invention belongs to the technical field of integrated circuits, in particular to an analog baseband link of a radio-frequency receiver compatible with ultra wide band (UWB) international standard and Chinese standard. The analog baseband link is composed of a pre-amplifier, a low pass filter capable of being reconfigured and a programmable gain amplifier, wherein the three modules are in cascade connection; both the pre-amplifier and the programmable gain amplifier are provided with wide bandwidths so as to maintain gain flatness within the intermediate-frequency bandwidth range of the two standards; and the low pass filter uses an improved Nauta transconductance structure and a DCCA array to realize an adjustable broadband (132MHz-264 MHz) of the cut-off frequency of the filter, thus the analog baseband link can support the two standards simultaneously. In the invention, the solution of the analog baseband link of the radio-frequency receiver compatible with the UWB WimediaOFDM standard and the UWB Chinese standard is put forward for the first time in China.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a radio frequency receiver analog baseband link which can be simultaneously compatible with the ultra-wideband Wimedia standard and the ultra-wideband Chinese standard. Background technique [0002] Since FCC opened 3.1-10.6 GHz as the UWB frequency band in 2002, research on UWB technology, especially UWB radio frequency transceivers, has rapidly become a hot spot in academia and industry. With Wimedia becoming the international standard of UWB and the determination of UWB frequency band in China, compatibility with Wimedia and Chinese standards will become a direction for the development of domestic UWB radio frequency chips. At present, China's UWB frequency band is roughly determined as low frequency band: 4092GHz-4884GHz; high frequency band: 6072GHz-8776GHz; corresponding to Wimedia MB-OFDM standard: its low frequency band is equivalent to Wimedia BAN...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16
Inventor 李巍高亭李宁任俊彦
Owner FUDAN UNIV
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