Patent EP0715423B1 successfully refreshed from Google Patents.
EP0715423B1
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Symbol error based power control for mobile telecommunication system
Assignee: AT&T Inc
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Filing: 1995-11-21
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Granted: 2002-10-02
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Expires: 2015-11-21
Abstract
No abstract record available.
Inventors
- 👤 Carl Francis Weaver
- 👤 Wei-Chung Peng
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 22:16
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/04; H04W52/06; H04W52/12; H04W52/18; H04W52/20; H04W52/24; H04W52/30; H04W52/36; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
A telecommunication system comprising: a transmitter (102) to transmit a data signal; a receiver (104) to receive said data signal; and a control loop to control a power output level of said transmitter based on
the detection of a symbol error rate of said data signal, wherein said control loop
comprises: a symbol error rate detector (302) for detecting a number of symbol
errors of said data signal and for outputting a symbol error rate; characterised in that said control loop further comprises: a summing node (304) for determining a difference between said symbol
error rate and a symbol error rate target to produce a symbol error rate error (320); an integration element (314) to integrate said symbol error rate error to
produce a signal power to noise power ratio target (214); and controlling means for controlling the power output level of the
transmitter based on said signal power to noise power ratio target.
Claim 2
Dependent Claim
99 words
The telecommunication system of claim 1, wherein said controlling
means comprises: a signal power to noise power detector (202) to detect a signal power to
noise power ratio of said data signal; a second summing node (108) for determining a difference between said
signal power to noise power ratio and said signal power to noise power ratio target to
produce a signal power to noise power ratio error; and a second integration element (118) to integrate said signal power to noise
power ratio error, an output of said second integration element controlling the power
output level of the transmitter.
Claim 3
Dependent Claim
114 words
A control loop for controlling a power output level of a transmitter of
a telecommunication system, comprising: a symbol error rate detector (404) for detecting a number of symbol
errors of a transmitted signal and for outputting a symbol error rate; characterised by : a summing node (416) for determining a difference between said symbol
error rate and a symbol error rate target to produce a symbol error rate error (432); an integration element (420) to integrate said symbol error rate error to
produce a signal power to noise power ratio target; and controlling means for controlling the power output level of the
transmitter based on said signal power to noise power ratio target.
Claim 4
Dependent Claim
40 words
The control loop of claim 3, further comprising a multiplier (418),
positioned between said summing node (416) and said integration element (420), for
multiplying said symbol error rate error by a signal power to noise power ratio conversion
factor (424).
Claim 5
Dependent Claim
105 words
The control loop of claim 3, wherein said means for controlling the
power output level comprises: a signal power to noise power detector (202) to detect a signal power to
noise power ratio of said transmitted signal; a second summing node (204) for determining a difference between said
signal power to noise power ratio and said signal power to noise power ratio target to
produce a signal power to noise power ratio error (216); and a second integration element (118) to integrate said signal power to noise
power ratio error, an output of said second integration element controlling the power
output level of the transmitter.
Claim 6
Dependent Claim
42 words
The power control loop of claim 5, further comprising a multiplier
(206); positioned between said second summing node (204) and said second integration
element (118), for multiplying said signal power to noise power ratio error by an energy
rate conversion factor (208).
Claim 7
Dependent Claim
20 words
The control loop of claim 3, further comprising a frame error detector
(402) for adjusting said symbol error rate target.
References Cited (Backward Citations)
No citation records indexed.
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