Nathaniel H Wilson

US Patent:

57578583, May 26, 1998

Filed:

Jan 7, 1997

Appl. No.:

8/779601

Inventors:

Peter J. Black - St. Lucia, AU
Nathaniel B. Wilson - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04L 2710
H04J 1302
H04B 104
H04B 116

US Classification:

375295

Abstract:

A dual-mode digital communication system for communicating an information signal during operation in frequency-modulated (FM) and multiple-access modes is disclosed herein. The digital communication system includes a dual-mode transmitter for transmitting the information signal using an FM communication signal during FM mode operation, and for transmitting the information signal using a multiple-access communication signal during multiple-access mode operation. The communication system further includes a dual-mode receiver for receiving the FM communication signal during FM mode operation, and for receiving the multiple-access communication signal during multiple-access mode operation. Incorporated within the dual-mode receiver is a digital demodulator for recovering the information signal from the received FM signal during operation in the FM mode, and for recovering the information signal from the received multiple-access signal during multiple-access mode operation. In a preferred implementation the dual-mode transmitter is disposed to convert a first sequence of binary data within the information signal into a sampled modulation waveform, and to provide the FM communication signal by modulating a carrier signal based at least in part on the sampled modulation waveform.

US Patent:

56148062, Mar 25, 1997

Filed:

Nov 29, 1994

Appl. No.:

8/346976

Inventors:

Nathaniel B. Wilson - San Diego CA
Elbert A. McLaren - San Diego CA

International Classification:

H02J 700

US Classification:

320 22

Abstract:

The battery charging system of the present invention charges the battery of a portable, multiple mode radiotelephone while the radiotelephone is operating. The radiotelephone generates a clock signal having varying on/off times dependent on the radiotelephone's mode. This mode can include an analog cellular mode or a digital cellular mode. The battery charger detects the clock signal's on/off times and changes the average charge current to compensate for one mode requiring a larger charge current.

US Patent:

54524733, Sep 19, 1995

Filed:

Feb 28, 1994

Appl. No.:

8/203151

Inventors:

Ana L. Weiland - Encinitas CA
Richard K. Kornfeld - San Diego CA
Richard J. Kerr - San Diego CA
John E. Maloney - San Diego CA
Nathaniel B. Wilson - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04B 140
H04B 104
H04B 106

US Classification:

455 88

Abstract:

The process and apparatus of the present invention limits the output power of a radiotelephone, operating in a cellular system in the preferred embodiment. This ensures the transmitted sidebands and synthesizer phase noise remains within a certain specification. This is accomplished by power detection and a correction accumulator that together generate a gain control signal by limiting the gain adjustment to a maximum value, even when the cell site communicating with the radiotelephone is sending power turn-up commands to the radiotelephone. This process includes dynamically correcting the output level of the transmitter due to gain variations in the transmitter stages or gain control elements.

US Patent:

60817240, Jun 27, 2000

Filed:

Jan 31, 1996

Appl. No.:

8/593305

Inventors:

Nathaniel B. Wilson - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04Q 732

US Classification:

455462

Abstract:

A portable communications device and accessory system which enables both voice and control commands to be communicated between a portable communication device and external accessories over a single flexible digital interface. When the portable communication device is interfaced to external accessories, such as a power booster and hands-free kit, a microprocessor configures the serial communications bus to pass both the digital voice data and digital control commands to and from the external power booster and the hands-free kit. The external hands-free kit contains its own auxiliary CODEC for encoding analog voice signals and decoding the digital voice data. When the portable communication device is not interfaced with external accessories, the microprocessor configures the serial communication bus to pass the digital voice data to and from an internal CODEC for use with the portable device's own microphone and speaker.

US Patent:

54691150, Nov 21, 1995

Filed:

Apr 28, 1994

Appl. No.:

8/235811

Inventors:

Paul E. Peterzell - San Diego CA
Nathaniel B. Wilson - San Diego CA
Peter J. Black - St. Lucia, AU

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03G 330

US Classification:

330129

Abstract:

An automatic gain control (AGC) apparatus for a digital receiver is disclosed herein. The AGC apparatus includes an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal, and an output port for providing an output signal. The AGC apparatus further includes a measurement circuit for generating a received power signal based on the power of the output signal. A saturating integrator compares the received power signal to a reference signal and generates an gain control signal in response to a result of the comparison. The saturating integrator includes a decision circuit for enabling integration based on values of the received power signal, the reference signal, and the gain control signal. In a preferred implementation the utilization of an input limiter in conjunction with an analog to digital converter enables accommodation of an increased input signal dynamic range. Accordingly, the AGC apparatus is capable of being used in digital demodulation of FM signals.

US Patent:

56278578, May 6, 1997

Filed:

Sep 15, 1995

Appl. No.:

8/528969

Inventors:

Nathaniel B. Wilson - San Diego CA

Assignee:

Qualcomm Incorporated - San Diego CA

International Classification:

H04B 138
H04L 516

US Classification:

375219

Abstract:

The present invention provides linear, digital automatic gain control (AGC) in a radio. A received signal is demodulated to provide I and Q digital baseband signals. A received signal strength indication is determined from these signals and the resulting digital signal is adjusted to provide a logarithmic response. This signal is then integrated to provide a digital receive AGC adjust signal. For the transmit AGC adjust, the digital receive AGC adjust signal is filtered and then summed with a scaled closed loop power control command. The closed loop power control commands are ignored if they would result in increasing the transmit gain beyond the amplifier's designed maximum output. The result of the sum operation converted from digital to analog for adjusting the amplifier. The outputs of the transmit and receive AGC amplifiers are linearized by transmit and receive linearizers, respectively, which pre-distort the digital AGC adjust signals prior to digital to analog conversion.

US Patent:

54992800, Mar 12, 1996

Filed:

Feb 2, 1995

Appl. No.:

8/382770

Inventors:

Nathaniel B. Wilson - San Diego CA
Gene H. McAllister - La Mesa CA

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03K 2348

US Classification:

377108

Abstract:

The clock signal generator of the present invention divides a higher frequency clock down to a frequency that is an uneven sub-multiple of the higher frequency. The input clock to be divided down clocks an 11-bit counter (105-110) that outputs an overflow signal to a D flip-flop (125). The D flip-flop generates a load signal that resets the counter after 1025 clock periods. The load signal also suppresses, after 1025 clock periods, the toggling of another toggle flip-flop (120) that provides a divide by two clock. By suppressing a clock pulse in the divide by two clock, every 1025 clock pulses of the higher frequency clock, the average clock frequency of the divide by two clock is reduced to an uneven sub-multiple of the higher clock frequency.

US Patent:

56170602, Apr 1, 1997

Filed:

Apr 13, 1995

Appl. No.:

8/423332

Inventors:

Nathaniel B. Wilson - San Diego CA
Peter J. Black - St. Lucia, AU
Paul E. Peterzell - San Diego CA

Assignee:

QUALCOMM Incorporated - San Diego CA

International Classification:

H03G 320

US Classification:

330129

Abstract:

An automatic gain control (AGC) and D. C. offset correction method and apparatus for controlling signal power of a received RF signal within a dual mode quadrature receiver is disclosed herein. In a preferred implementation the automatic gain control apparatus may be adjusted to provide a desired control response to various fading characteristics of a received FM, FSK, GMSK, QPSK, or BPSK signal. The AGC apparatus includes an adjustable gain amplifier having an input port for receiving an input signal, a control port for receiving a gain control signal, and an output port for providing an output signal. A quadrature downconverter coupled to the output port serves to translate the frequency of the output signal to a baseband frequency, thereby producing baseband signals. In a preferred implementation the downconverter is operative to map the carrier frequency of the output signal to a baseband frequency offset by a predetermined margin from D. C. Two high gain active lowpass filters provide out-of-band signal rejection for the baseband signals. A D. C.