Method and apparatus for transmitting and receiving variable rate data
AssigneeQUALCOMM Incorporated
InventorsPeter J. Black, Gadi Karmi, Nagabhushana T. Sindhushayana
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Abstract
A variable rate transmission system transmits a variable rate data packet including an accompanying rate indication signal indicative of the transmission rate of the variable data packet. The data packet can be spread using a long pseudonoise (PN) code, the mask of which can be selected in accordance with the transmission rate of the variable rate data packet. A preamble, providing the transmission rate, can be punctured into an outgoing pilot signal. The rate indication signal can be encoded in accordance with a set of orthogonal functions that are part of the indication of the transmission rate of the data packet.
Claims13
A method for transmitting a variable rate data packet, comprising:
- receiving said variable rate data packet;
- encoding said variable rate data packet;
- receiving a rate indication signal indicating a transmission rate of said variable rate packet;
- encoding said rate indication signal in accordance with a predetermined set of encoding formats wherein the encoding formats are selected in accordance with a value of the rate indication signal;
- receiving a rate request message;
- encoding said rate request message;
- and
- receiving said encoded variable data rate packet;
- covering said encoded variable rate packet in accordance with a first orthogonal covering format;
- receiving said encoded rate indication signal;
- and
- covering said encoded rate indication signal in accordance with a second orthogonal covering format.
A system for transmitting a variable rate data packet, comprising:
- data coding means for receiving said variable rate data packet and for encoding said variable rate data packet;
- rate indication coding means for receiving a rate indication signal indicating a transmission rate of said variable rate packet and for encoding said rate indication signal in accordance with a predetermined set of encoding formats wherein the encoding formats are selected in accordance with a value of said rate indication signal;
- pilot coding means for encoding a set of pilot symbols to provide a pilot signal;
- multiplexer means for combining said encoded rate indication signal and said pilot signal;
- and
- rate request coding means for receiving a rate request message, encoding said rate request message and providing said encoded rate request message to said multiplexer means, wherein said multiplexer means combines said encoded rate request message with said pilot signal and said rate indication signal.
A method for transmitting a variable rate data packet, comprising:
- receiving said variable rate data packet;
- encoding said variable rate data packet;
- receiving a rate indication signal indicating a transmission rate of said variable rate packet;
- encoding said rate indication signal in accordance with a predetermined set of encoding formats wherein the encoding formats are selected in accordance with a value of the rate indication signal;
- encoding a set of pilot symbols to provide a pilot signal;
- combining said encoded rate indication signal and said pilot signal;
- receiving a rate request message and encoding said message;
- and
- combining said encoded rate request message with said pilot signal and said encoded rate indication signal.
Dependencies are inferred from the claim text.