Motorola Corporation

John Thomas Solar

Alexander Wayne Hietala

Louis Jay Vannatta

George Jeffrey Geier

David Ryan Haub

Eric Jay Hefner

Christopher F Bussan

Todd Conroy

A method in a radio communication device having a receiver receiving a wideband signal in the presence of narrowband blockers method in direct conversion and intermediate frequency RF receivers including determining power for signal distortion products (), determining power for a desired signal and the distortion products (), filtering the signal distortion products with a filter having a bandwidth of rejection, and dynamically adjusting a rejection property () as a function of the power for both the desired signal and the signal distortion products. In some embodiments, a determination is made whether a ratio of powers exceeds a threshold () as a condition for adjusting the rejection property.

Communications receivers and methods therefor

The present invention provides a method and apparatus for generating time of arrival estimates for use by a wireless communication network for locating the position of a wireless or mobile source () within the service area of the wireless communication network. The mobile source generates time of arrival estimates from data bursts received from base sites () operating within the network. In at least one embodiment, the mobile source (), then, communicates the time of arrival estimates for each of the base sites () to the network, from which the location of the mobile source () is determined. In at least some instances, the mobile units additionally determine a variance estimate for each time of arrival estimates, which is representative of the degree of confidence in the time of arrival information being supplied to the network.

Method and apparatus for generating time of arrival estimates for use in determining a location

A dual mode wireless device in which a coefficient generator ( ) generates parameter values for a GSM waveform, based on transmitted sequences of digital data values from a GSM unit ( ), using a multiplierless operation, and a waveform generator generating the GSM waveform using the generated parameter values. The coefficient generator includes adder sections ( ), each having corresponding adders ( ) and multipliers ( ), register sections ( ), each containing parameters corresponding to a modulator ( ), and transmit data registers (TXDATA&lsqb; &rsqb;-TXDATA&lsqb; &rsqb;) sequentially receiving the digital data values from the GSM unit. The coefficient generator generates the parameter values for the GSM waveform by multiplying each of the parameters in the register sections by a one or a negative one, responsive to the digital data values in the transmit data registers, and adding the resulting products to form corresponding coefficient generator output values.

Digital waveform generator apparatus and method therefor

A waveform generator for generating a waveform in a dual mode wireless device includes a first waveform generator portion (,) and a second waveform generator portion (,). The first waveform generator portion includes a first register (,) connected in series with a second register (,) and a first feedback selector (,), and the second waveform generator portion includes a third register (,) connected in series with a fourth register (,) and a second feedback selector (,). The first register and the third register, and the second register and the fourth register are set up as accumulators, and a new output data value of the first and third register is obtained by adding a corresponding previous data value of the first register and the third register, respectively, and a corresponding previous data value of the second register and the fourth register, respectively, and a new data output value of the second and fourth register is obtained by adding a corresponding previous data value of the second register and the fourth register, respectively, and a scaled previous output data value of the first and third registers.

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Algonquin, IL, United States of America

John Thomas Solar