US 7,254,373 B2 · Antenna diversity based on packet errors

Abstract

A wireless transceiver including multiple antennas, an antenna switch, and a media access controller that controls the antenna switch for determining when to switch to another antenna based on packet error rate (PER). Instead of switching the antenna on a packet-by-packet basis, antenna selection is made after one or more packets errors have been detected. The CRC is used to identify receive packet errors. A timer is used to determine each transmit packet error when an acknowledge packet is not received in time. A method of selecting from among multiple antennas including counting packet errors, comparing a packet error count with a threshold value to determine a threshold condition, switching to a different antenna if the threshold condition is met, and resetting the packet error count when the threshold condition is met.

Claims22

Dependent claims

A wireless transceiver, comprising:

a plurality of antennas;
an antenna switch coupled to said plurality of antennas;
and
a media access controller, coupled to control said antenna switch, that determines when to switch to another antenna based on packet error rate, wherein said media access controller comprises:
CRC check logic that determines an error in a received packet;
a timer that determines a predetermined amount of time after a packet is transmitted;
a memory that stores at least one packet error count;
and antenna select logic, coupled to said CRC check logic, said timer and said memory, that counts received packet errors using said CRC check logic, that counts transmit packet errors using said timer, and that controls switching to another antenna.

5 more elements

Dependencies are inferred from the claim text.

Antenna diversity based on packet errors

Life of this patent

Antenna diversity based on packet errors

Life of this patent

Abstract

Claims22