Universal radio architecture for low-tier personal communication system
First Claim
1. An integrated circuit chip set for use in a radio communication system in which a modulated digital input signal is processed for transmission and a modulated signal received from an antenna is processed to provide an output signal, wherein the modulation of the signals is either quadrature phase shift keying (QPSK) or frequency shift keying (FSK) and the signal transmission and reception is by either time-division duplex (TDD) or frequency-division duplex (FDD), the chip set comprisingan intermediate frequency (IF) integrated circuit chip for processing a digital input signal to convert the digital input signal into an analog input signal and to provide the input signal at an intermediate frequency and for processing a received signal at the intermediate frequency to down convert the frequency thereof and to provide an output signal from the down-converted received signal;
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wherein the IF chip and the RF chip in combination includemeans for providing the input signal at said intermediate frequency when the modulation of the digital input signal is QPSK modulated and for providing the input signal at said intermediate frequency and/or at the transmission frequency when the modulation of the digital input signal is FSK modulated; and
means for sampling the down-converted received signal to provide said output signal when the down-converted received signal is QPSK modulated and for demodulating the down-converted received signal to provide said output signal when the down-converted received signal is FSK modulated; and
wherein the IF chip includes switches and terminals for enabling the IF chip to be connected for said processing by the IF chip of QPSK-modulated signals or to be connected for said processing by the IF chip of FSK-modulated signals; and
wherein the RF chip includes terminals for enabling the RF chip to be connected for said processing by the RF chip of TDD transmitted and received signals or to be connected for said processing by the RF chip of FDD transmitted and received signals.
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Accused Products
Abstract
An integrated circuit chip set is provided for use in a radio communication system in which a modulated digital input signal is processed for transmission and a modulated signal received from an antenna is processed to provide an output signal, wherein the modulation of the signals is either QPSK or FSK and the signal transmission and reception is by either TDD or FDD. The chip set includes an IF integrated circuit chip for processing a digital input signal to convert the digital input signal into an analog input signal and to provide the input signal at an intermediate frequency and for processing a received signal at the intermediate frequency to down convert the frequency thereof and to provide an output signal from the down-converted received signal; and an RF integrated circuit chip for processing the input signal provided by the IF chip at the intermediate frequency to up convert the frequency thereof to a transmission frequency and for processing a received signal provided at the reception frequency to down convert the frequency thereof to the intermediate frequency. The IF chip includes switches and terminals for enabling the IF chip to be connected for processing by the IF chip of QPSK-modulated signals or to be connected for processing by the IF chip of FSK-modulated signals; and the RF chip includes terminals for enabling the RF chip to be connected for processing by the RF chip of TDD transmitted and received signals or to be connected for processing by the RF chip of FDD transmitted and received signals.
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Citations
19 Claims
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1. An integrated circuit chip set for use in a radio communication system in which a modulated digital input signal is processed for transmission and a modulated signal received from an antenna is processed to provide an output signal, wherein the modulation of the signals is either quadrature phase shift keying (QPSK) or frequency shift keying (FSK) and the signal transmission and reception is by either time-division duplex (TDD) or frequency-division duplex (FDD), the chip set comprising
an intermediate frequency (IF) integrated circuit chip for processing a digital input signal to convert the digital input signal into an analog input signal and to provide the input signal at an intermediate frequency and for processing a received signal at the intermediate frequency to down convert the frequency thereof and to provide an output signal from the down-converted received signal; - and
a radio frequency (RF) integrated circuit chip for processing the input signal provided by the IF chip at the intermediate frequency to up convert the frequency thereof to a transmission frequency and for processing a received signal provided at the reception frequency to down convert the frequency thereof to the intermediate frequency; wherein the IF chip and the RF chip in combination include means for providing the input signal at said intermediate frequency when the modulation of the digital input signal is QPSK modulated and for providing the input signal at said intermediate frequency and/or at the transmission frequency when the modulation of the digital input signal is FSK modulated; and means for sampling the down-converted received signal to provide said output signal when the down-converted received signal is QPSK modulated and for demodulating the down-converted received signal to provide said output signal when the down-converted received signal is FSK modulated; and wherein the IF chip includes switches and terminals for enabling the IF chip to be connected for said processing by the IF chip of QPSK-modulated signals or to be connected for said processing by the IF chip of FSK-modulated signals; and wherein the RF chip includes terminals for enabling the RF chip to be connected for said processing by the RF chip of TDD transmitted and received signals or to be connected for said processing by the RF chip of FDD transmitted and received signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An intermediate frequency (IF) integrated circuit chip for use in a radio communication system in which a modulated digital input signal is processed for transmission and a signal received from an antenna is processed to provide a demodulated output signal, wherein the modulation of the digital input signal is either quadrature phase shift keying (QPSK) or frequency shift keying (FSK), wherein the chip is adapted for processing a digital input signal to convert the digital input signal into an analog input signal and to provide the input signal at an intermediate frequency and for processing a received signal at the intermediate frequency to down convert the frequency thereof and to provide an output signal from the down-converted received signal, the chip comprising
means for providing the input signal at said intermediate frequency when the modulation of the digital input signal is QPSK modulated and for providing the input signal at said intermediate frequency when the modulation of the digital input signal is FSK modulated; -
means for sampling the down-converted received signal to provide said output signal when the down-converted received signal is QPSK modulated and for demodulating the down-converted received signal to provide said output signal when the down-converted received signal is FSK modulated; and switches and terminals for enabling the IF chip to be connected for said processing by the IF chip of QPSK-modulated signals or to be connected for said processing by the IF chip of FSK-modulated signals. - View Dependent Claims (13, 14, 15)
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16. A radio frequency (RF) integrated circuit chip set for use in a radio communication system in which a modulated digital input signal is processed for transmission and a signal received from an antenna is processed to provide a demodulated output signal, wherein the signal transmission and reception is by either time-division duplex (TDD) or frequency-division duplex (FDD), the chip comprising
means for processing an input signal provided at the intermediate frequency to up convert the frequency thereof to a transmission frequency and for processing a received signal provided at the reception frequency to down convert the frequency thereof to the intermediate frequency; - and
terminals for enabling the chip to be connected for said processing of TDD transmitted and received signals or to be connected for said processing of FDD transmitted and received signals. - View Dependent Claims (17, 18, 19)
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Specification