Method and system using ternary sequences for simultaneous transmission to coherent and non-coherent receivers
First Claim
1. A method of data-symbol-to-chip mapping, the method comprising:
- generating data symbols based on input bits; and
mapping the data symbols to a set of ternary sequences,wherein the mapping is determined by a modulation format, andwherein the set of ternary sequences comprises a ternary sequence c0 and a ternary sequence cm, the cm being cyclic shifted from the c0 by m locations, the m being an integer.
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Abstract
The present invention describes a method and system for simultaneous transmission of data to coherent and non-coherent receivers. The method at the transmitter includes retrieving a base ternary sequence having a pre-defined length, obtaining one or more ternary sequences corresponding to data to be transmitted and transmitting the obtained one or more ternary sequences by the transmitter. The method steps at the receiver includes receiving one or more ternary sequences corresponding to the data transmitted, demodulating each of the received ternary sequences by correlating with all cyclic shifts of the base ternary sequence by the receiver if the receiver is a coherent receiver, demodulating each of the received ternary sequences by correlating with all cyclic shifts of the absolute of the base ternary sequence by the receiver if the receiver is a non-coherent receiver and detecting the transmitted data based on the cyclic shifts corresponding to maximum correlation values.
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Citations
14 Claims
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1. A method of data-symbol-to-chip mapping, the method comprising:
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generating data symbols based on input bits; and mapping the data symbols to a set of ternary sequences, wherein the mapping is determined by a modulation format, and wherein the set of ternary sequences comprises a ternary sequence c0 and a ternary sequence cm, the cm being cyclic shifted from the c0 by m locations, the m being an integer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for performing data-symbol-to-chip mapping, the apparatus comprising:
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a processor configured to generate data symbols based on input bits, and map the data symbols to a set of ternary sequences, wherein the mapping is determined by a modulation format, and wherein the set of ternary sequences comprises a ternary sequence c0 and a ternary sequence cm, the cm being cyclic shifted from the c0 by m locations, the m being an integer. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification