Communication device having a wideband receiver and operating method therefor
First Claim
1. A receiver circuit for a communication device, the receiver circuit arranged to receive a plurality of carriers having relatively high but differing frequencies, the receiver circuit comprising:
- a frequency converter coupled to receive and arranged to down-convert the plurality of relatively high frequency carriers to a plurality of relatively low but differing frequency carriers; and
a plurality of receiver chain branches coupled to the output of the frequency converter, each receiver chain branch having a filter arranged to isolate selected ones of the plurality of relatively low frequency carriers thereby facilitating subsequent analog-to-digital conversion.
7 Assignments
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Accused Products
Abstract
To accommodate for a release of uncleared spectrum in a wideband communication system (10) while improving isolation in a receiver (FIG. 4) between wideband carriers, a common intermediate frequency converter down-converts differing but relatively high frequency carriers, incident to the receiver, to corresponding differing but relatively low frequency carriers. Receiver chains (174-176) response to the plurality of relatively low frequency carriers each have a filter (140-144) arranged to isolate selected ones of the relatively low frequency carriers. In a radio frequency communication system having three or more frequency sequential carriers, the receiver chains (174-176) may include branches that have filters that further isolate carriers within the receiver by applying non-sequential carriers to the branches in each receiver chain.
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Citations
22 Claims
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1. A receiver circuit for a communication device, the receiver circuit arranged to receive a plurality of carriers having relatively high but differing frequencies, the receiver circuit comprising:
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a frequency converter coupled to receive and arranged to down-convert the plurality of relatively high frequency carriers to a plurality of relatively low but differing frequency carriers; and
a plurality of receiver chain branches coupled to the output of the frequency converter, each receiver chain branch having a filter arranged to isolate selected ones of the plurality of relatively low frequency carriers thereby facilitating subsequent analog-to-digital conversion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A base station for a communication system having a universal frequency re-use scheme, the base station having a receiver circuit arranged to receive a plurality of modulated wideband carriers having relatively high but differing frequencies, the receiver circuit comprising:
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a frequency converter coupled to receive the plurality of modulated wideband carriers and arranged to down-convert the relatively high frequencies to a plurality of relatively low but differing frequency carriers; and
a plurality of receiver chain branches coupled to the output of the frequency converter each receiver chain branch having a filter arranged to isolate selected ones of the plurality of relatively low frequency carriers, thereby facilitating subsequent analong-to-digital conversion. - View Dependent Claims (19, 20, 21)
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22. A method of isolating a plurality of carriers incident to a receiver of a radio frequency communication system having a universal frequency re-use pattern, the plurality of carriers having relatively high but differing frequencies, the method comprising the steps of:
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applying the plurality of carriers to a common frequency converter arranged to down-convert the relatively high frequencies to a plurality of relatively low but differing frequency carriers; and
isolating selected ones of the plurality of relatively low frequency carriers by applying the plurality of relatively low frequency carriers to a plurality of receiver chain branches coupled to the output of the frequency converter, each branch having a dedicated band-pass filter, thereby facilitating subsequent analog-to-digital conversion.
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Specification