Signal processing in communication systems
First Claim
Patent Images
1. A method of signal processing comprising the steps of:
- detecting, in a first communication system, a level of a signal transmitted by a mobile station;
generating a signal compatible with a second communication system;
adjusting the level of the generated signal compatible with a second communication system to be substantially proportional to the detected level of the signal transmitted by the mobile station in the first communication system; and
inputting the adjusted generated signal into the second communication system for processing related to functions of the second communication system.
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Abstract
An AMPS system facilitates reception and processing of a DS CDMA signal transmitted by a mobile station (125). The AMPS system provides an alternate path for the signal to be received by a DS CDMA receiver (506) system. The DS CDMA receiver system generates a signal compatible with the AMPS system, adjusts the generated signal to be proportional to the DS CDMA signal, and inputs the adjusted signal (510) into the AMPS system. The AMPS system then processes the adjusted signal for purposes of handoff of the mobile station (125) from the DS CDMA system to the AMPS system.
39 Citations
16 Claims
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1. A method of signal processing comprising the steps of:
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detecting, in a first communication system, a level of a signal transmitted by a mobile station; generating a signal compatible with a second communication system; adjusting the level of the generated signal compatible with a second communication system to be substantially proportional to the detected level of the signal transmitted by the mobile station in the first communication system; and inputting the adjusted generated signal into the second communication system for processing related to functions of the second communication system. - View Dependent Claims (2, 3, 4, 15)
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5. A method of facilitating handoff between unlike communication systems, the method comprising the steps of:
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detecting, in a receiver of a first communication system, a level of a signal transmitted by a mobile station communicating within the first communication system; generating a transmission signal compatible with a second communication system; adjusting the level of the transmission signal compatible with a second communication system to be substantially proportional to the detected level of the signal transmitted by the mobile station communicating with the first communication system; and inputting the adjusted generated signal into a receiver of the second communication system for processing related to handoff functions. - View Dependent Claims (6, 7, 16)
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8. An apparatus for facilitating handoff between unlike communication systems, the apparatus comprising:
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means for detecting a level a signal transmitted by a mobile station within a first communication system; means for generating a signal compatible with a second communication system; means for adjusting the generated signal compatible with the second system to be substantially proportional to the detected level of the signal transmitted by a mobile station with the first communication system; and means for transmitting the adjusted generated signal compatible with the second system to the second communication system for processing related to handoff functions. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus for enabling measurement of a mobile station communicating in a code division multiple access (CDMA) communication system at a target analog radiotelephone system, said apparatus comprising:
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a CDMA receiver for detecting the signal strength of a signal transmitted by the mobile station; means for generating a signal compatible with the analog radiotelephone system; means for adjusting a signal strength of the generated signal compatible with the analog radiotelephone system to be substantially proportional to the signal strength of the signal transmitted by the mobile station; and means for inputting said adjusted generated signal into a receiver of the analog radiotelephone system. - View Dependent Claims (14)
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Specification