Method and apparatus for enhancing the call access rate in a communication system
First Claim
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1. A method for enhancing the call access rate in a communication system, comprising the steps of:
- generating a pilot signal from a FPGA (Field Programmable Gate Array) integrated with a multi-carrier digital transceiver;
producing a phase-equalized beacon signal from said generated pilot signal;
multiplying said phase-equalized beacon signal by a predetermined oscillation frequency generated by a NCO (Numerical Control Oscillator), said NCO producing an output signal;
summing up said NCO output signal with a pre-distorted user data output signal;
rearranging said summed up signal for synchronization and power amplification, said amplified signal including said beacon signal;
delivering a quantized IF (Intermediate Frequency) signal to a notch filter, said quantized IF signal including said beacon signal; and
using said notch filter to remove said beacon signal from said quantized IF signal.
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Abstract
A method and apparatus for enhancing the call access rate in a communication system generates a pilot signal from a FPGA (Field Programmable Gate Array) integrated with a multi-carrier digital transceiver, produces a phase-equalized beacon signal from said generated pilot signal, and multiplies the phase-equalized beacon signal by a predetermined oscillation frequency generated by a NCO (Numerical Control Oscillator). The NCO output is summed up with a pre-distorted user data output signal. The summed up signal is rearranged for synchronization and power amplification.
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Citations
16 Claims
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1. A method for enhancing the call access rate in a communication system, comprising the steps of:
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generating a pilot signal from a FPGA (Field Programmable Gate Array) integrated with a multi-carrier digital transceiver;
producing a phase-equalized beacon signal from said generated pilot signal;
multiplying said phase-equalized beacon signal by a predetermined oscillation frequency generated by a NCO (Numerical Control Oscillator), said NCO producing an output signal;
summing up said NCO output signal with a pre-distorted user data output signal;
rearranging said summed up signal for synchronization and power amplification, said amplified signal including said beacon signal;
delivering a quantized IF (Intermediate Frequency) signal to a notch filter, said quantized IF signal including said beacon signal; and
using said notch filter to remove said beacon signal from said quantized IF signal. - View Dependent Claims (2, 3, 4, 5)
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6. A method for enhancing the call access rate in a communication system, comprising the steps of:
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integrating a FPGA (Field Programmable Gate Array) with a multi-carrier digital transceiver, said integrated FPGA adapted to perform double rate quadrature demodulation, beacon signal generation and notch filtering;
using said integrated FPGA to generate a beacon signal;
passing said generated beacon signal through a pulse shaping filter;
passing said pulse-shaped beacon signal through a phase equalizer filter; and
hopping said pulse-shaped beacon signal to a frequency position of a predetermined offset from a defined center frequency.
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7. A method for enhancing the call access rate in a communication system, comprising the steps of:
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performing time division on a user data signal;
passing said time-divided user data signal through a combiner with CFR (Crest Factor Reduction), said combiner with CFR producing an output signal;
delivering said combined output signal to a digital pre-distorter to enhance the linearity of an associated power amplifier; and
sending pre-distorted data to a FPGA (Field Programmable Gate Array) integrated with a multi-carrier digital transceiver, said integrated FPGA adapted to perform double rate quadrature demodulation, beacon signal generation and notch filtering on said pre-distorted data.
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8. An apparatus for enhancing the call access rate in a communication system, comprising:
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a first FPGA (Field Programmable Gate Array) adapted to perform time division on a user data signal;
means for filtering said time-divided user data signal to reduce interference from neighboring channels;
a digital pre-distorter adapted to process said filtered user data; and
a second FPGA adapted to perform double rate quadrature demodulation, beacon signal generation and notch filtering on said pre-distorted data. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification