Second-Order Polynomial, Interpolation-Based, Sampling Rate Converter and Method and Transmitters Employing the Same
First Claim
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1. A sampling rate converter, comprising:
- an input configured to receive digital data from a first clock domain sampled at a first sampling rate;
an output configured to provide digital data to a second clock domain sampled at a second sampling rate that differs from said first sampling rate; and
a filter with a second-order, polynomial-based impulse response coupled to said input and said output and configured to apply coefficients having only one nonunitary divisor to said digital data from said first clock domain.
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Abstract
A sampling rate converter, a method of performing digital sampling rate conversion and a wireless transmitter incorporating the filter or the method. In one embodiment, the sampling rate converter includes: (1) an input configured to receive digital data from a first clock domain sampled at a first sampling rate, (2) an output configured to provide digital data to a second clock domain sampled at a second sampling rate that differs from the first sampling rate and (3) a filter with a second-order, polynomial-based impulse response coupled to the input and the output and configured to apply coefficients having only one nonunitary divisor to the digital data from the first clock domain.
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Citations
22 Claims
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1. A sampling rate converter, comprising:
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an input configured to receive digital data from a first clock domain sampled at a first sampling rate; an output configured to provide digital data to a second clock domain sampled at a second sampling rate that differs from said first sampling rate; and a filter with a second-order, polynomial-based impulse response coupled to said input and said output and configured to apply coefficients having only one nonunitary divisor to said digital data from said first clock domain. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of performing digital sampling rate conversion, comprising:
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receiving digital data from a first clock domain sampled at a first sampling rate; and employing a filter with a second-order, polynomial-based impulse response to apply coefficients having only one nonunitary divisor to said digital data from said first clock domain, thereby to provide digital data to a second clock domain sampled at a second sampling rate that differs from said first sampling rate. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A wireless transmitter, comprising:
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a digital baseband unit; a pulse-shaping filter coupled to the digital baseband unit and configured to operate in a first clock domain to provide digital data sampled at a first sampling rate; a sample rate converter coupled to said pulse-shaping filter and responsive to an interpolating signal to apply coefficients having only one nonunitary divisor to said digital data from said first clock domain; and an output coupled to said sample rate converter and configured to provide digital data to a second clock domain sampled at a second sampling rate that differs from said first sampling rate. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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Specification