Method and system using ternary sequences for simultaneous transmission to coherent and non-coherent receivers

• US 10,205,612 B2
• Filed: 02/05/2018
• Issued: 02/12/2019
• Est. Priority Date: 10/29/2013
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Jos, Sujit, Ps, Chandrashekhar Thejaswi, Bynam, Kiran, Hong, Young Jun, Park, Chang Soon, Choudhary, Manoj
• Primary Examiner(s): Bayard, Emmanuel
• Application Number:
  US15/888,510
• Publication Number:
  US 20180159705A1
• Time in Patent Office: 372 Days
• Field of Search: 375287, 375295, 375343
• CPC Class Codes: H04B 1/709 Correlator structure
• CPC Class Codes: H04B 1/71637 Receiver aspects H04B1/7183 takes precedence
• CPC Class Codes: H04L 25/03312 Arrangements specific to the provision of output signals
• CPC Class Codes: H04L 25/03834 using pulse shaping
• CPC Class Codes: H04L 25/4923 using ternary codes H04L25/4927 takes precedence
• CPC Class Codes: H04L 27/04 Modulator circuits; Transmitter circuits
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: Y02D 30/70 in wireless communication networks

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.

Claims

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, and

wherein the set of ternary sequences comprises a ternary sequence c₀ and a ternary sequence c_m, the c_m being cyclic shifted from the c₀ by m locations, the m being an integer.

2. The method of claim 1, wherein the modulation format is a TASK (ternary amplitude shift keying).

3. The method of claim 1, wherein the c_m is a cyclic shifted from the c₀ by them locations to a right.

4. The method of claim 3, wherein:

the c₀ is {0 0 0 1 −

1 0 1 1} in case of the modulation format being 3/8-TASK (ternary amplitude shift keying), and

the c₀ is {−

1 0 0 1 0 1 −

1 0 −

1 −

1 1−

1 0 1 0 1 0 0 0 1 0 0 1 1 −

1 0 0 0 0 0 1 1} in case of the modulation format being 5/32-TASK.

5. The method of claim 1, wherein in case of the modulation format being 3/8-TASK, a number of the data symbols are 8, and

wherein the 8 data symbols are mapped to 8-length ternary sequences.

6. The method of claim 1, wherein in case of the modulation format being 3/8-TASK, the c₀ corresponding to a data symbol “

0”

is obtained, the c₀ being {0 0 0 1 −

1 0 1 1}.

7. The method of claim 1, wherein a length of the ternary sequences is 2^k, the k being a size of the data symbols.

8. An apparatus for performing data-symbol-to-chip mapping, the apparatus comprising:

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 c_m, the c_m being cyclic shifted from the c₀ by m locations, the m being an integer.

9. The apparatus of claim 8, wherein the modulation format is a TASK (ternary amplitude shift keying).

10. The apparatus of claim 8, wherein the c_m is cyclic shifted from the c₀ by the m locations.

11. The apparatus of claim 10, wherein:

the c₀ is {0 0 0 1 −

1 0 1 1} in case of the modulation format being 3/8-TASK(ternary amplitude shift keying), and

the c₀ is {−

1 0 0 1 0 1 −

1 0 −

1 −

1 1 −

1 0 1 0 1 0 0 0 1 0 0 1 1 −

1 0 0 0 0 0 1 1} in case of the modulation format being 5/32-TASK.

12. The apparatus of claim 8, wherein in case of the modulation format being 3/8-TASK, a number of the data symbols are 8, and

wherein the 8 data symbols are mapped to 8-length ternary sequences.

13. The apparatus of claim 8, wherein in case of the modulation format being 3/8-TASK, the c₀ corresponding to a data symbol “

0”

is obtained, the c₀ being {0 0 0 1 −

1 0 1 1}.

14. The apparatus of claim 8, wherein a length of the ternary sequences is 2^k, the k being a size of the data symbols.