Apparatus for receiver with multi-bit observation interval and associated methods
First Claim
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1. An apparatus, comprising:
- a radio frequency (RF) receiver having a multi-bit observation interval, the RF receiver comprising a;
a Coordinate Rotation Digital Computer (Cordic) circuit to receive a complex signal derived from RF signals and to generate a phase signal;
a timing correlator and frequency offset estimator circuit coupled to receive data derived from a frequency signal derived from the phase signal; and
a Viterbi decoder circuit coupled to provide decoded data derived from the frequency signal.
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Abstract
An apparatus includes a radio frequency (RF) receiver having a multi-bit observation interval. The RF receiver includes a Coordinate Rotation Digital Computer (Cordic) circuit to receive a complex signal derived from RF signals and to generate a phase signal. The RF receiver further includes a timing correlator and frequency offset estimator coupled to receive data derived from a frequency signal derived from the phase signal. The RF receiver in addition includes a Viterbi decoder coupled to provide decoded data derived from the frequency signal.
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Citations
20 Claims
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1. An apparatus, comprising:
a radio frequency (RF) receiver having a multi-bit observation interval, the RF receiver comprising a; a Coordinate Rotation Digital Computer (Cordic) circuit to receive a complex signal derived from RF signals and to generate a phase signal; a timing correlator and frequency offset estimator circuit coupled to receive data derived from a frequency signal derived from the phase signal; and a Viterbi decoder circuit coupled to provide decoded data derived from the frequency signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An integrated circuit (IC), comprising:
a radio frequency (RF) receiver, comprising; a Coordinate Rotation Digital Computer (Cordic) circuit to receive in-phase and quadrature signals derived from RF signals and to generate phase and amplitude signals; a signal arrival detector circuit to use the phase and amplitude signals to detect arrival of an RF signal and to provide a signal detect output signal; and a timing correlator and frequency offset estimator circuit coupled to receive a frequency signal derived from the phase signal to selectively perform at least one of;
(a) initial timing detection, (b) frequency offset estimation, (c) timing tracking, and (d) frequency offset tracking.- View Dependent Claims (11, 12, 13, 14)
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15. A method of receiving radio frequency (RF) signals, the method comprising:
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receiving time domain signals derived from the RF signals in a Coordinate Rotation Digital Computer (Cordic) circuit and generating a phase signal; using a timing correlator and frequency offset estimator to provide at least one of initial timing detection, frequency offset estimation, timing tracking, and frequency offset tracking using data derived from a frequency signal derived from the phase signal; and decoding, using a Viterbi decoder, data derived from the frequency signal. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification