Spatial modulation multiple-input-multiple-output (sm-mimo) system

Patent metadata

Field	Value
Publication number	US-2016233933-A1
Application number	US-201314382659-A
Country	US
Kind code	A1
Filing date	Oct 16, 2013
Priority date	Oct 16, 2013
Publication date	Aug 11, 2016
Grant date	—

Abstract

In an SM-MIMO wireless communication system, multiple transmitting antennae may be utilized to transmit wireless signals that carry signal sequences. A selection of the multiple transmitting antennae may be configured to represent a portion of the signal sequences so that channel state information (CSI) is not required at the receiving end of the SM-MIMO system.

First claim

We claim:

1 . A method for modulating sequences in a wireless communication system, comprising:
receiving multiple sections of a divided signal sequence, each of which includes multiple binary digits; for each of the multiple sections, selecting a first one of multiple transmitting antennae during a time interval in accordance with at least a portion of the multiple binary digits; for each of the multiple sections, generating multiple modulation symbols to be transmitted by the selected first one of the multiple transmitting antennae during the time interval in accordance with other portions of the multiple binary digits; generating a matrix symbol by combining the generated multiple modulation symbols of consecutive ones of the multiple sections; and switching, from the first one of the multiple transmitting antennae, to a second one of the multiple transmitting antennae if the selected first one of the multiple transmitting antennae was selected in a preceding time interval for the matrix symbol.

2 . The method of claim 1 , further comprising:
differential encoding the multiple modulation symbols of the matrix symbol; transmitting the encoded modulation symbols via the selected first one of the multiple transmitting antennae if the first one of the multiple transmitting antennae was not selected in the preceding time interval for the matrix symbol; and transmitting the encoded modulation symbols via the second one of the multiple transmitting antennae if the first one of the multiple transmitting antennae was selected in the preceding time interval for the matrix symbol.

3 . The method of claim 1 , further comprising mapping the at least a portion of the multiple binary digits to one of the multiple transmitting antennae in accordance with a predetermined spatial modulation mapping table.

4 . The method of claim 1 , wherein the generating comprises generating the multiple modulation symbols in accordance with Phase-Shifting Keying (PSK) scheme.

5 . The method of claim 1 , wherein the signal sequence is divided into the multiple sections in accordance with a count of multiple subcarriers determined for transmitting the signal sequence.

6 . The method of claim 1 , wherein the assembling comprises selecting the consecutive ones of the multiple sections in accordance with a count of the multiple transmitting antennae.

7 . The method of claim 3 , wherein the generating further comprises mapping the other portions of the multiple binary digits to the multiple modulation symbols in accordance with the predetermined spatial modulation mapping table.

8 . A wireless communication system, comprising:
multiple transmitting antennae; a signal generator configured to generating a signal sequence; and a modulation module configured to:
divide the signal sequence into multiple sections, each of which includes multiple binary digits,
for each of the multiple sections, select a first one of the multiple transmitting antennae during a time interval in accordance with at least a portion of the multiple binary digits,
for each of the multiple sections, generate multiple modulation symbols to be transmitted by the selected first one of the multiple transmitting antennae during the time interval in accordance with other portions of the multiple binary digits,
generate a matrix symbol by combining the generated multiple modulation symbols of consecutive ones of the multiple sections; and
switching to a second one of the multiple transmitting antennae if the selected first one of the multiple transmitting antennae was selected in a preceding time interval for the matrix symbol.

9 . The system of claim 8 , wherein the modulation module is further configured to:
differential encode the multiple modulation symbols of the matrix symbol based on at least a matrix symbol generated for an immediately preceding section; transmit the encoded modulation symbols via the selected first one of the multiple transmitting antennae if the first one of the multiple transmitting antennae was not selected in the preceding time interval for the matrix symbol; and transmit the encoded modulation symbols via the second one of the multiple transmitting antennae if the first one of the multiple transmitting antennae was selected in the preceding time interval for the matrix symbol.

10 . The system of claim 8 , wherein the modulation module is further configured to map the at least a portion of the multiple binary digits to one of the multiple transmitting antennae in accordance with a predetermined spatial modulation mapping table.

11 . The system of claim 8 , wherein the multiple modulation symbols are generated in accordance with Phase-Shifting Keying (PSK) scheme.

12 . The system of claim 8 , wherein a count of the multiple sections is equal to a count of multiple subcarriers determined for transmitting the signal sequence.

13 . The system of claim 8 , wherein a count of the consecutive ones of the multiple sections is equal to a count of the multiple transmitting antennae.

14 . The system of claim 10 , wherein the modulation module is further configured to map the other portions of the multiple binary digits to the multiple modulation symbols in accordance with the predetermined spatial modulation mapping table.

15 . A computer-readable medium that stores executable-instructions that, when executed, cause one or more processors to perform operations comprising:
receiving multiple sections of a divided signal sequence, each of which includes multiple binary digits; for each of the multiple sections, selecting a first one of multiple transmitting antennae during a time interval in accordance with at least a portion of the multiple binary digits; for each of the multiple sections, generating multiple modulation symbols to be transmitted by the selected first one of the multiple transmitting antennae during the time interval in accordance with other portions of the multiple binary digits; generating a matrix symbol by combining the generated multiple modulation symbols of consecutive ones of the multiple sections; switching to a second one of the multiple transmitting antennae if the selected first one of the multiple transmitting antennae was selected in a preceding time interval for the matrix symbol; differential encoding the multiple modulation symbols of the matrix symbol; transmitting the encoded modulation symbols via the selected first one of the multiple transmitting antennae if the first one of the multiple transmitting antennae was not selected in the preceding time interval for the matrix symbol; and transmitting the encoded modulation symbols via the second one of the multiple transmitting antennae if the first one of the multiple transmitting antennae was selected in the preceding time interval for the matrix symbol.

16 . The computer-readable medium of claim 15 , further comprising mapping the at least a portion of the multiple binary digits to one of the multiple transmitting antennae in accordance with a predetermined spatial modulation mapping table.

17 . The computer-readable medium of claim 15 , wherein the generating comprises generating the multiple modulation symbols in accordance with Phase-Shifting Keying (PSK) scheme.

18 . The computer-readable medium of claim 15 , wherein the signal sequence is divided into the multiple sections in accordance with a count of multiple subcarriers determined for transmitting the signal sequence.

19 . The computer-readable medium of claim 15 , wherein assembling

Assignees

• Xiao Yue
• Xiao Lixia
• Fang Jun
• Empire Technology Dev Llc

Inventors

• Xiao Yue
• Xiao Lixia
• Fang Jun

Classifications

• H04B7/0456 Primary

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04L27/18

  Phase-modulated carrier systems, i.e. using phase-shift keying (H04L27/32 takes precedence) · CPC title

• H04B7/0604 Primary

  with predefined switching scheme · CPC title

• H04B7/0608

  Antenna selection according to transmission parameters · CPC title