Wireless communication system with transmit diversity designs
AssigneeCisco Technology, Inc.
InventorRichard L. Smith
Life of this patent
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Abstract
An apparatus for enabling a base station to transmit radio frequency signals with a transmit diversity technique comprises a first antenna implemented in the base station; and a second antenna implemented in the base station, and placed apart from the first antenna by a predetermined distance. The first antenna utilizes a first frequency band of a predetermined frequency spectrum for transmitting signals, and the second antenna utilizes a second frequency band of the predetermined frequency spectrum for transmitting signals. The first and second frequency bands do not overlap.
Claims17
An apparatus comprising:
- a first antenna;
- a second antenna;
- a first transceiver coupled to the first antenna;
- and
- a second transceiver coupled to the second antenna, wherein the first and second transceivers are configured to receive as inputs, signals having a frequency spectrum including first and second non-overlapping frequency portions, and wherein the first transceiver is configured to transmit to a destination device only the first frequency portion of the signals using a first frequency band of a predetermined spectrum via the first antenna and wherein the second transceiver is configured to transmit to the destination device only the second frequency portion of the signals using a second frequency band of the predetermined spectrum via the second antenna;
- wherein the first and second frequency bands do not overlap.
A system comprising:
- a mobile unit;
- and
- a base station configured to receive signals from and transmit signals to the mobile unit, the base station comprising:
- a first antenna;
- a second antenna;
- a first transceiver coupled to the first antenna;
- and
- a second transceiver coupled to the second antenna, wherein the first and second transceivers are configured to receive as inputs, signals having a frequency spectrum including first and second frequency portions, wherein the first frequency portion is in a first half of the frequency spectrum and the second frequency portion is in a second half of the frequency spectrum, and wherein the first transceiver is configured to transmit to a destination device only the first frequency portion of the signals using a first frequency band of a predetermined spectrum via the first antenna and wherein the second transceiver is configured to transmit to the destination device only the second frequency portion of the signals using a second frequency band of the predetermined spectrum via the second antenna;
- wherein the first and second frequency bands do not overlap.
A method comprising:
- receiving at first and second transceivers of a wireless communication device input signals having a frequency spectrum including first and second non-overlapping frequency portions;
- transmitting to a destination device only the first frequency portion of the signals via a first antenna of the wireless communication device in a first frequency band of a predetermined spectrum;
- and
- transmitting to the destination device only the second frequency portion of the signals via a second antenna of the wireless communication device in a second frequency band of the predetermined spectrum;
- wherein the first frequency band and the second frequency band and do not overlap.
Dependencies are inferred from the claim text.