Method and system for digital spur cancellation
First Claim
1. A method for providing wireless communication, the method comprising:
- removing a spur in a first baseband signal generated from a FM signal, comprising;
generating an orthogonal signal when said first baseband signal is generated; and
adjusting a phase of said generated orthogonal signal so that said spur in said first baseband signal is cancelled when said baseband signal is combined with said phase adjusted orthogonal signal.
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Accused Products
Abstract
A method and system for digital spur cancellation may include removing a spur in a left channel minus right channel (L−R) baseband signal generated from a FM signal. The L−R baseband signal may be generated by demodulating a sub-carrier, for example, by using CORDIC algorithm, in a signal demodulated from the FM signal. An orthogonal signal may also be generated by demodulating a sub-carrier, for example, by using CORDIC algorithm, in a signal demodulated from the FM signal. The phase of the orthogonal signal may be further adjusted to introduce a substantially −90° phase shift to spurs at a specific frequency. Accordingly, the spurs in the L−R baseband signal may be cancelled when the first L−R baseband signal is combined with the phase adjusted orthogonal signal.
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Citations
24 Claims
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1. A method for providing wireless communication, the method comprising:
removing a spur in a first baseband signal generated from a FM signal, comprising;
generating an orthogonal signal when said first baseband signal is generated; and
adjusting a phase of said generated orthogonal signal so that said spur in said first baseband signal is cancelled when said baseband signal is combined with said phase adjusted orthogonal signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A machine-readable storage having stored thereon, a computer program having at least one code section for providing wireless communication, the at least one code section being executable by a machine for causing the machine to perform steps comprising:
removing a spur in a first baseband signal generated from a FM signal, comprising;
generating an orthogonal signal when said first baseband signal is generated; and
adjusting a phase of said generated orthogonal signal so that said spur in said first baseband signal is cancelled when said baseband signal is combined with said phase adjusted orthogonal signal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system for providing wireless communication, the system comprising:
circuitry that enables removal of a spur in a first baseband signal generated from a FM signal, comprising;
a baseband generation circuitry that enables generation of an orthogonal signal when said first baseband signal is generated; and
a delay circuitry that enables adjustment of a phase of said generated orthogonal signal so that combining said first baseband signal with said phase adjusted orthogonal signal may result in a combined baseband signal in which said spur is cancelled. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
Specification