Patent
Automatic gain control method for highly integrated communication receiver
Suwon Kang,Jeong-Woo Lee,Joonbae Park,Kyeongho Lee +3 more
- 27 Mar 2002
132
TL;DR: In this article, a wireless or wired communication system and gain control method is provided including a transmitter and a receiver, where a gain controller (828) monitors the signal level of each gain stage (830, 846, 862) to place its gain to optimal value.
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Abstract: A wireless or wired communication system and method is provided including a transmitter and a receiver. A RF communication system in accordance with the present invention includes an apparatus and gain control method between RF receiver (803) and baseband modem (804) in case of a plurality of gain stages (830, 846, 862) inside a receiver (803). The gain of each stage (830, 846, 862) can be controlled by an integrated gain controller (828). The gain controller (828) monitors the signal level of each gain stage (830, 846, 862) to place its gain to optimal value. The gain control apparatus and method can be implemented in a digital AGC system. The gain controller (828) accepts a signal (826) implementing gain control and thus there is no stability issue. When distributed gain stages are present inside a related art receiver and separate gain control loops are used, stability issues can arise.
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Citations
Patent
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Neil T. Hobbs,Nelson C. Schmidt,Thomas Kummetz,Fred W. Phillips +3 more
- 16 Feb 2010
TL;DR: In this article, an operational noise measurement is obtained by measuring a noise value outside of a first device, but within a bandwidth of a second, subsequent device by tuning an input band of the element to shift the input band partially or completely outside of the first device to create an open band.
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- 07 Feb 2007
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Pauli Seppinen,Aarno Parssinen,Mikael Gustafsson,Mika Makitalo +3 more
- 12 Mar 2003
TL;DR: In this paper, a method for operating a RF receiver of a communications equipment, as well as circuitry for implementing the method, is described, which includes, while operating under the control of a data processor of the communication equipment, generating a calibration signal; injecting the calibration signal into a low noise amplifier (LNA) of the RF receiver; measuring a downconverted response of the receiver at a plurality of different frequencies of the calibration signals; and at least one of tuning a resonance frequency of the LNA resonator based on the measured down-converted responses so as to
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Keith R. Baldwin,Mark A. Webster +1 more
- 30 Jul 2001
TL;DR: In this paper, the authors present a method of controlling operation of a wireless device configured in a zero intermediate frequency architecture including a DC loop and a gain loop. But their method is limited to two cases: clear channel assessment and expected acknowledgement.
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Norio Hayashi,Noriyoshi Hagino,Toshiki Matsui,Kazuo Watanabe,Satoshi Tanaka +4 more
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TL;DR: In this article, a signal processing semiconductor integrated circuit of the direct conversion system, which includes a dummy amplifier having the same circuit configuration as a low noise amplifier being the first stage amplifier, is presented.
66
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122
Patent
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Patent
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90
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