Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1996-12-17
2000-06-27
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455 674, 4552261, 455330, H04B 118
Patent
active
060817003
ABSTRACT:
A radio (100) includes a receiver circuitry (106) for use in conjunction with a tunable antenna (101). The radio includes a controller (122) which may be a digital signal processor. The controller (122) controls various radio functions including tuning of the antenna (101), measurement of the quality of received signals, and generation of a test signal. The radio is capable of generating a test signal on a desired frequency, which is radiated within the radio, received at the antenna (101) and then processed by receiver circuitry (106). Its quality is then measured and used to control the tuning of the antenna (101). The test signal generated by the controller (122) can be mixed up to the desired frequency by using one or more of the local oscillator signals of the radio.
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Leizerovich Gustavo D.
Salvi Raul
Armstrong Darnell R.
Bethards Charles W.
Eisenzopf Reinhard J.
Motorola Inc.
Nichols Daniel K.
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