The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2014
Filed:
Mar. 14, 2013
Blackberry Limited, Waterloo, CA;
Wen-Yen Chan, Thornhill, CA;
Qingzhong Jiao, Fremont, CA (US);
Xin Jin, Waterloo, CA;
Nasserullah Khan, Waterloo, CA;
BlackBerry Limited, Waterloo, CA;
Abstract
A transmitter for a mobile device utilizes at least one mapper to improve power efficiency while still meeting out of band spurious emissions and waveform quality requirements. An encoder and modulator generates an encoded and modulated transmit signal from an input signal and a DAC then generates an analog representation of the encoded and modulated transmit signal. An amplifier stage coupled to the DAC amplifies the analog representation of the encoded and modulated transmit signal to generate a transmission signal. The transmitter further comprises an amplifier control block that generates an amplifier control signal to adjust at least one parameter of the amplifier stage. The amplifier control block includes at least one mapper to determine the amplifier control signal based on a peak to average power ratio and an average transmit power of the transmission signal. Environmental and operating conditions of the transmitter may be accounted for in the mappers.