Frame synchronization detection with an adaptive threshold
A wireless device includes a receiver to receive a packet via one or more antennas. A frame synchronization detection circuit coupled to the receiver identifies a data pattern within a portion of the packet. A correlation circuit coupled to the frame synchronization detection circuit identifies one or more properties of the data pattern and computes one or more values of a correlation peak using a correlation method. An adaptive threshold circuit coupled to the correlation circuit determines a correlation threshold value using the one or more properties of the data pattern and the one or more values of the correlation peak.
1 . A system comprising:
a wireless device; and
one or more antennas, the wireless device comprising:
a receiver to receive a packet via the one or more antennas;
a frame synchronization detection circuit coupled to the receiver to identify a data pattern within a portion of the packet; and
a correlation circuit coupled to the frame synchronization detection circuit to:
identify one or more properties of the data pattern; and
compute one or more values of a correlation peak using a correlation method; and
an adaptive threshold circuit coupled to the correlation circuit to:
determine a correlation threshold value using the one or more properties of the data pattern and the one or more values of the correlation peak.
2 . The system of claim 1 , wherein to identify the data pattern, the frame synchronization detection circuit is further to identify a pre-known data pattern within the portion of the packet indicative of a start of a frame in the packet, wherein the pre-known data pattern comprises a plurality of bits.
3 . The system of claim 1 , wherein to identify the one or more properties of the data pattern, the correlation circuit is further to:
identify one or more repeated symbols within the data pattern;
compute a sum of the one or more repeated symbols within the data pattern; and
store the sum of the one or more repeated symbols in a look-up table.
4 . The system of claim 1 , wherein to identify one or more properties of the data pattern, the correlation circuit is further to:
identify one or more non-repeated symbols within the data pattern;
compute a sum of the one or more non-repeated symbols within the data pattern; and
store the sum of the one or more non-repeated symbols in a look-up table.
5 . The system of claim 1 , wherein to identify the one or more properties of the data pattern, the correlation circuit is further to:
determine at least one of:
a sum of one or more singleton zero patterns within the data pattern; and
a sum of one or more singleton one patterns within the data pattern.
6 . The system of claim 1 , wherein to identify the one or more properties of the data pattern, the correlation circuit is further to:
determine a sum of one or more transition zero patterns;
determine a sum of one or more transition one patterns; and
determine at least one of:
a sum of one or more singleton zero patterns within the data pattern; and
a sum of one or more singleton one patterns within the data pattern.
7 . The system of claim 1 , wherein to identify the one or more properties of the data pattern, the correlation circuit is further to:
determine a sum of one or more non-transition zero patterns;
determine a sum of one or more non-transition one patterns; and
determine at least one of:
a sum of one or more singleton zero patterns within the data pattern; and
a sum of one or more singleton one patterns within the data pattern.
8 . A method of operating a wireless device, the method comprising:
receiving a packet over a communication channel;
identifying a data pattern within a portion of the packet;
identifying one or more properties of the data pattern;
computing one or more values of a correlation peak using a correlation method; and
determining a correlation threshold value using the one or more properties of the data pattern and the one or more values of the correlation peak.
9 . The method of claim 8 , wherein identifying the data pattern comprises identifying a pre-known data pattern within the portion of the packet indicative of a start of a frame in the packet, wherein the pre-known data pattern comprises a plurality of bits.
10 . The method of claim 8 , wherein identifying the one or more properties of the data pattern comprises:
identifying one or more repeated symbols within the data pattern;
computing a sum of the one or more repeated symbols within the data pattern; and
storing the sum of the one or more repeated symbols in a look-up table.
11 . The method of claim 8 , wherein identifying the one or more properties of the data pattern comprises:
identifying one or more non-repeated symbols within the data pattern;
computing a sum of the one or more non-repeated symbols within the data pattern; and
storing the sum of the one or more non-repeated symbols in a look-up table.
12 . The method of claim 8 , wherein identifying the one or more properties of the data pattern comprises:
determining at least one of:
a sum of one or more singleton zero patterns within the data pattern; and
a sum of one or more singleton one patterns within the data pattern.
13 . The method of claim 8 , wherein identifying the one or more properties of the data pattern comprises:
determining a sum of one or more transition zero patterns;
determining a sum of one or more transition one patterns; and
determining at least one of:
a sum of one or more singleton zero patterns within the data pattern; and
a sum of one or more singleton one patterns within the data pattern.
14 . The method of claim 8 , wherein identifying the one or more properties of the data pattern comprises:
determining a sum of one or more non-transition zero patterns;
determining a sum of one or more non-transition one patterns; and
determining at least one of:
a sum of one or more singleton zero patterns within the data pattern; and
a sum of one or more singleton one patterns within the data pattern.
15 . A wireless device comprising:
a receiver to receive a packet over a communication channel;
a frame synchronization detection circuit coupled to the receiver to identify a data pattern within a portion of the packet;
a correlation circuit coupled to the frame synchronization detection circuit to:
identify one or more properties of the data pattern; and
compute one or more values of a correlation peak using a correlation method; and
an adaptive threshold circuit coupled to the correlation circuit to determine a correlation threshold value using the one or more properties of the data pattern and the one or more values of the correlation peak.
16 . The wireless device of claim 15 , wherein to identify the data pattern, the frame synchronization detection circuit is further to identify a pre-known data pattern within the portion of the packet indicative of a start of a frame in the packet, wherein the pre-known data pattern comprises a plurality of bits.
17 . The wireless device of claim 15 , wherein to identify one or more properties of the data pattern, the correlation circuit is further to:
identify one or more repeated symbols within the data pattern;
compute a sum of the one or more repeated symbols within the data pattern; and
store the sum of the one or more repeated symbols in a look-up table.
18 . The wireless device of claim 15 , wherein to identify the one or more properties of the data pattern, the correlation circuit is further to:
identify one or more non-repeated symbols within the data pattern;
compute a sum of the one or more non-repeated symbols within the data pattern; and
store the sum of the one or more non-repeated symbols in a look-up table.
19 . The wireless device of claim 15 , wherein to identify the one or more properties of the data pattern, the correlation circuit is further to:
determine at least one of:
a sum of one or more singleton zero patterns within the data pattern; and
a sum of one or more singleton one patterns within the data pattern.
20 . The wireless device of claim 15 , wherein to identify the one or more properties of the data pattern, the correlation circuit is further to:
determine a sum of one or more transition zero patterns;
determine a sum of one or more transition one patterns; and
determine at least one of:
a sum of one or more singleton zero patterns within the data pattern; and
a sum of one or more singleton one patterns within the data pattern.