Patent US6487667B1 successfully refreshed from Google Patents.
Patent EP0594358A2 successfully refreshed from Google Patents.
EP0594358A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method and apparatus for reducing the peak-to-average power in multi-carrier RF communication systems
Assignee: AT&T Inc
•
Filing: 1993-10-13
•
Granted: —
•
Expires: 2013-10-13
Abstract
Abstract Apparatus for controlling a system including a linear amplifier (109) processing a plurality of carrier signals (111-114) of a multi channel carrier system alters the phases (by 131-134) of one or more sources of the multi-channel signals in response to a detected peak envelope power (in 153) or of a peak to average power (in 152) ratio at regular scheduled intervals. This reduces the peak envelope power to average envelope power ratio and enables the reduction in the power rating required by the amplifiers handling the multi-channel signal. <IMAGE>
Inventors
- 👤 Bernard James Arntz
- 👤 William Allen Nitz
- 👤 Josef Ocenasek
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-07 15:40
CPC Classifications
H; H03; H03G; H03G3/00; H03G3/20; H03G3/30; H03G3/3036; H03G3/3042; H03F; H03F1/00; H03F1/34; H04; H04L; H04L27/00; H04L27/26; H04L27/2601; H04L27/2614; H04L27/2621; H04L27/2626; H04L27/2627; H04L27/2637; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
159 words
In a power amplifier system for a radio transmission communication system; a power splitter (122) for dividing an input composite signal into a plurality of parallel channels (123-126); a powercombiner (106) connected to combine the signals on the parallel channels into a single output channel (107); CHARACTERIZED BY: each of the parallel channels including a radio transmitter (101-104); an amplifier for amplifying the signal on the single output channel (109); means for monitoring a peak power level (153) of the signal on the single output channel; means for monitoring an average power level (152) of the signal on the single output channel; means for developing a ratio of peak power to average power (161) connected to receive inputs form the means for monitoring a peak power and means for monitoring an average power; means for altering phases (131-134) of the signals of the radio transmitters in response to the means for developing when the ratio exceeds a specified value.
Claim 2
Dependent Claim
159 words
In a power amplifier system for a radio transmission communication system; a power splitter (122) for dividing an input composite signal into a plurality of parallel channels (123-126); a powercombiner (106) connected to combine the signals on the parallel channels into a single output channel (107); CHARACTERIZED BY: each of the parallel channels including a radio transmitter (101-104); an amplifier for amplifying the signal on the single output channel (109); means for monitoring a peak power level (153) of the signal on the single output channel; means for monitoring an average power level (152) of the signal on the single output channel; means for developing a ratio of peak power to average power (161) connected to receive inputs form the means for monitoring a peak power and means for monitoring an average power; means for altering phases (131-134) of the signals of the radio transmitters in response to the means for developing when the ratio exceeds a specified value.
Claim 3
Dependent Claim
146 words
In a power amplifier system processing a composite radio carrier signal in a plurality of parallel channels each including a radio transmitter with the parallel channels fed into a single channel including a single power amplifier, a method of increasing an average power handling capacity of the single power amplifier, CHARACTERIZED BY the steps of: monitoring a peak power level of the single channel handled by the single power amplifier and determining if it exceeds a power threshold; altering a phase of one of the radio carrier signal in at least one of the parallel channels if the peak power exceeds the threshold; again determining if the peak power exceeds the threshold; altering a phase of the radio carrier signal in another one of the parallel channels; and ceasing alteration of phases of the radio carrier signals when the peak power does not attain the threshold.
Claim 4
Dependent Claim
146 words
In a power amplifier system processing a composite radio carrier signal in a plurality of parallel channels each including a radio transmitter with the parallel channels fed into a single channel including a single power amplifier, a method of increasing an average power handling capacity of the single power amplifier, CHARACTERIZED BY the steps of: monitoring a peak power level of the single channel handled by the single power amplifier and determining if it exceeds a power threshold; altering a phase of one of the radio carrier signal in at least one of the parallel channels if the peak power exceeds the threshold; again determining if the peak power exceeds the threshold; altering a phase of the radio carrier signal in another one of the parallel channels; and ceasing alteration of phases of the radio carrier signals when the peak power does not attain the threshold.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.