Chip rate selectable square root raised cosine filter for mobile telecommunications
AssigneeIntel Corporation
InventorsTinku Acharya, George J. Miao
Life of this patent
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Abstract
A square root raised cosine filter for a mobile transceiver may be adapted to operate with a variety of potential chip rates such as the four chip rates associated with IMT-2000 standard. The signal produced by the filter may be adjusted based on a variety of potential chip rates. One of the adjusted filter signals may be selected as the resulting filter output, depending on the particular chip rate selected for the mobile transceiver.
Claims26
A finite impulse response filter having a selectable chip rate comprising a discrete-time square-root-raised-cosine filter and a circuit that adjusts the output of said filter based on the selected chip rate, wherein said circuit includes a multiplier that multiplies the output of the filter by a factor selected based on the selected chip rate.
A wide band code division multiple access transceiver having a selectable chip rate comprising:
- an analog processing section;
- and
- a digital processing section coupled to said analog processing section, said digital processing section including a finite impulse response filter and a circuit that adjust the filter output depending on the selected chip rate of said transceiver, wherein said filter includes a multiplier that multiplies the output of the filter by a factor selected based on the selected chip rate.
A method of implementing a code division multiple access receiver comprising:
- receiving a code division multiple access signal;
- selectively filtering said signal depending on the chip rate of said receiver;
- and
- multiplying the filter output by a factor dependent on the selected chip rate.
An article comprising a medium for storing instructions that cause a processor-based system to:
- receive a code division multiple access signal;
- selectively filter said signal depending on the chip rate of said receiver;
- and
- multiply the filter output by a factor dependent on the selected chip rate.
Dependencies are inferred from the claim text.