Motorola Solutions, Inc.

Kar Boon Oung

Charles R Ruelke

Richard S Young

V C Prakash V K Chacko

Chow Loong Cheah

Cheah Heng Tan

Moh Lim Sim

Thean Hai Ooi

Ting Fook Tang

Huoy Thyng Yow

V C Prakash Vk Chacko

Kim Loy Lai

A very low intermediate frequency (VLIF) receiver and a method of controlling a VLIF receiver. The method comprises estimating energy levels in first and second signals and detecting interference from a first adjacent channel interferer based upon a difference in energy in the first and second signals. The first signal comprising a first on-channel portion and an adjacent channel portion and the second signal comprises an intermediate frequency translation of the first on-channel portion. The energy levels are estimated for corresponding time instances and the adjacent channel interferer is of the adjacent channel portion. The VLIF receiver is then controlled based upon the detected interference.

Very low intermediate frequency (VLIF) receiver and a method of controlling a VLIF receiver

An apparatus and method for reducing FM audio artifacts in a receiver are provided. A direct conversion radio frequency (RF) receiver converts an analog FM signal into a phase shifted digital low IF signal. A digital controller coupled to the analog FM receiver provides adaptive frequency translation for different channel spacing and provides adaptive low IF configuration through the different channel spacing, thereby suppressing audio artifacts.

Method and apparatus for reducing FM audio artifacts in a receiver

A method and apparatus for receiving and playing a signal in a radio receiver to suppress microphonic feedback are provided by alternately pitch shifting a received audio signal. The pitch of the received audio signal is alternately shifted up and then down, repeatedly over successive intervals of the audio signal, to produce a pitch swing signal which is then played over a speaker. The alternating pitch shifting prevents the buildup of regenerative feedback normally caused by acoustic vibrations coupling into the radio receiver.

Method and apparatus for receiving and playing a signal in a radio receiver

Growing community of inventors

Penang, Malaysia

Kar Boon Oung