Method for selection between VAMOS receiver and non-VAMOS receiver in user equipment

Patent metadata

Field	Value
Publication number	US-9853665-B2
Application number	US-201615221201-A
Country	US
Kind code	B2
Filing date	Jul 27, 2016
Priority date	Dec 28, 2015
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

An apparatus and a method are provided for selecting a receiver in a user equipment (UE). The method includes receiving, at the UE, a signal; determining, at the UE, a switch metric based on correlation metrics of a training sequence of the signal; comparing, at the UE, the switch metric with a threshold; and selecting, at the UE, one of a voice services over adaptive multi-user channels on one slot (VAMOS) receiver and a non-VAMOS receiver based on the comparing result.

First claim

What is claimed is:

1. A method for selecting a receiver in a user equipment (UE), the method comprising:
receiving, at the UE, a signal;
generating a first correlation metric based on a correlation of a training sequence of the signal with a local training sequence for the UE in a voice services over adaptive multi-user channels on one slot (VAMOS) mode;
generating a second correlation metric based on a correlation of the training sequence of the signal with a local training sequence for the UE in a non-VAMOS mode;
determining a switch metric based on the first correlation metric and the second correlation metric;
comparing, at the UE, the switch metric with a threshold; and
selecting, at the UE, one of a VAMOS receiver and a non-VAMOS receiver based on the comparing result.

2. The method of claim 1 , wherein selecting the one of the VAMOS receiver and the non-VAMOS receiver comprises:
selecting the VAMOS receiver when the switch metric is greater than or equal to the threshold; and
selecting the non-VAMOS receiver when the switch metric is less than the threshold.

3. The method of claim 1 , further comprising:
designing a cost function including a correlation metric of the training sequence of the signal;
estimating a hypothesis for the cost function; and
determining the threshold based on the hypothesis.

4. The method of claim 1 , wherein the threshold distinguishes between the VAMOS mode and the non-VAMOS mode.

5. The method of claim 1 , wherein the VAMOS receiver includes an alpha-quadrature phase shift keying (AQPSK) receiver.

6. The method of claim 1 , wherein the non-VAMOS receiver includes a Gaussian minimum shift keying (GMSK) receiver.

7. A user equipment (UE) comprising:
at least one processor; and
a memory including a computer executable program code, which when executed, controls the at least one processor,
wherein the at least one processor is configured to:
receive a signal;
generate a first correlation metric based on a correlation of a training sequence of the signal with a local training sequence for the UE in a voice services over adaptive multi-user channels on one slot (VAMOS) mode;
generate a second correlation metric based on a correlation of the training sequence of the signal with a local training sequence for the UE in a non-VAMOS mode;
determine a switch metric based on the first correlation metric and the second correlation metric;
compare the switch metric with a threshold; and
select one of a VAMOS receiver and a non-VAMOS receiver based on the comparing result.

8. The UE of claim 7 , wherein the at least one processor is further configured to select the VAMOS receiver when the switch metric is greater than or equal to the threshold, and select the non-VAMOS receiver when the switch metric is less than the threshold.

9. The UE of claim 7 , wherein the computer executable program code controls the at least one processor to:
design a cost function including a correlation metric of the training sequence of the signal;
estimate a hypothesis for the cost function; and
determine the threshold based on the hypothesis.

10. The UE of claim 9 , the threshold distinguishes between the VAMOS mode and the non-VAMOS mode.

11. The UE of claim 7 , wherein the VAMOS receiver comprises an alpha-quadrature phase shift keying (AQPSK) receiver.

12. The UE of claim 7 , wherein the non-VAMOS receiver comprises a Gaussian minimum shift keying (GMSK) receiver.

13. A computer program product comprising a computer executable program code recorded on a computer readable non-transitory storage medium, wherein the computer executable program code, when executed, causes a user equipment to:
receive a signal;
generate a first correlation metric based on a correlation of a training sequence of the signal with a local training sequence for the UE in a voice services over adaptive multi-user channels on one slot (VAMOS) mode;
generate a second correlation metric based on a correlation of the training sequence of the signal with a local training sequence for the UE in a non-VAMOS mode;
determine a switch metric based on the first correlation metric and the second correlation metric;
compare the switch metric with a threshold; and
select one of a VAMOS receiver and a non-VAMOS receiver based on the comparing result.

14. The computer program product of claim 13 , wherein the computer executable program code causes the user equipment to:
select the VAMOS receiver when the switch metric is greater than or equal to the threshold; and
select the non-VAMOS receiver when the switch metric is less than the threshold.

15. The computer program product of claim 13 , wherein the computer executable program code causes the user equipment to:
design a cost function include a correlation metric of the training sequence of the signal;
estimate a hypothesis for the cost function; and
determine the threshold based on the hypothesis.

16. The computer program product of claim 13 , wherein the VAMOS receiver includes an alpha-quadrature phase shift keying (AQPSK) receiver.

17. The computer program product of claim 13 , wherein the non-VAMOS receiver includes a Gaussian minimum shift keying (GMSK) receiver.

Assignees

• Samsung Electronics Co Ltd
• Samsung Electronics Co Ltd

Inventors

• Mishra Samir Kumar
• Godavarti Uma Kishore Satya Venkata
• Jain Vikas

Classifications

• H04B1/06 Primary

  Receivers · CPC title

• H04L27/2017

  in which the phase changes are non-linear, e.g. generalized and Gaussian minimum shift keying, tamed frequency modulation (H04L27/201 takes precedence) · CPC title

• H04B7/02 Primary

  Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas (RAKE receivers H04B1/7115) · CPC title

• H04L27/22

  Demodulator circuits; Receiver circuits · CPC title