Method for selecting receiver mode of mobile terminal with two receivers

• US 7,877,067 B2
• Filed: 10/11/2007
• Issued: 01/25/2011
• Est. Priority Date: 10/16/2006
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Hwang, Bo Seung, Park, Joo Yong, Park, Young Cheol
• Primary Examiner(s): NGUYEN, SIMON
• Application Number:
  US11/870,816
• Publication Number:
  US 20080090606A1
• Time in Patent Office: 1,202 Days
• Field of Search: 455/66.11, 455/67.13, 455132-136, 4552261-2264, 4555521-5531, 375346-349
• US Class Current: 455/132
• CPC Class Codes: H04B 1/0064 with separate antennas for the more than one band H04B1/0053 takes precedence
• CPC Class Codes: H04B 1/406 with more than one transmission mode, e.g. analog and digital modes
• CPC Class Codes: H04B 7/082 selecting best antenna path
• CPC Class Codes: H04B 7/0868 Hybrid systems, i.e. switching and combining
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Provided is a method for selecting a receiver mode of a mobile terminal having two receivers and that can receive a signal using either or both of the two receivers depending on a channel environment. A method for selecting a receiver mode of a wireless communication terminal having at least two receivers includes computing at least one parameter for determining the receiver mode from a received signal; comparing the at least one parameter with a preset threshold; and selecting one only of a single receiver mode in which either of the two receivers is activated and a dual receiver mode in which both of the receivers are activated according to the comparison result. The method enables a receiver mode to switch between single and dual receiver modes adaptively according to a wireless environment, thus achieving stable signal reception without compromising reception sensitivity.

Claims

1. A method for selecting a receiver mode of a wireless communication terminal having two receivers and that is capable of receiving a signal using either or both of the two receivers depending on a channel environment, the method comprising:

computing a Received Signal Strength Indicator (RSSI), a Carrier to Interference plus Noise Ratio (CINR), and a Bit Error Rate (BER) from a received signal;

determining whether the RSSI is greater than or equal to a first RSSI threshold;

activating, if the RSSI is less than the first RSSI threshold, both of the receivers;

determining, if the RSSI is greater than or equal to the first RSSI threshold, whether the RSSI is greater than or equal to a second RSSI threshold; and

activating, if the RSSI is greater than or equal to the second RSSI threshold, only one of the two receivers.

2. The method of claim 1, wherein the first RSSI threshold is less than the second RSSI threshold.

3. The method of claim 2, wherein the first and second RSSI thresholds are −

90 dBm and −

80 dBm, respectively.

4. The method of claim 1, further comprising:

determining, if the RSSI is less than the second RSSI threshold, whether the BER is less than a BER threshold; and

activating, if the BER is less than the BER threshold, only one of the two receivers.

5. The method of claim 4, wherein the BER threshold is 1%.

6. The method of claim 4, further comprising:

determining, if the BER is not less than the BER threshold, whether the CINR is greater than a CINR threshold; and

activating, if the CINR is greater than the CINR threshold, either of the two receivers.

7. The method of claim 6, further comprising activating, if the CINR is not greater than the CINR threshold, both of the receivers.

8. The method of claim 6, wherein the CINR threshold is 6 dB.