Symbol error detection for bluetooth basic data rate packets

A wireless network device comprising:

• a processor;
• a receiver unit coupled with the processor, the receiver unit configured to:
• determine a frequency associated with a first symbol of a received signal;
• generate, at each of a plurality of filters matched to a frequency response of the wireless network device for a corresponding each of a plurality of predefined symbol combinations, a frequency output associated with each of the plurality of predefined symbol combinations;
• determine a frequency error, associated with each of the plurality of predefined symbol combinations, that indicates a difference between the frequency output associated with each of the plurality of predefined symbol combinations and the frequency associated with the first symbol of the received signal;
• determine that a first predefined symbol combination of the plurality of predefined symbol combinations is associated with a smallest frequency error of the frequency errors associated with the plurality of predefined symbol combinations;
• and
• decode the first symbol of the received signal based, at least in part, on the first predefined symbol combination associated with the smallest frequency error.

One or more non-transitory machine-readable storage media, having instructions stored therein, which, when executed by one or more processors causes the one or more processors to perform operations that comprise:

• determining a frequency associated with a first symbol of a signal received at a receiver of a wireless network device;
• generating, at each of a plurality of filters matched to a frequency response of the receiver for a corresponding each of a plurality of predefined symbol combinations, a frequency output associated with each of the plurality of predefined symbol combinations;
• determining a frequency error, associated with each of the plurality of predefined symbol combinations, that indicates a difference between the frequency output associated with each of the plurality of predefined symbol combinations and the frequency associated with the first symbol of the received signal;
• determining that a first predefined symbol combination of the plurality of predefined symbol combinations is associated with a smallest frequency error of the frequency errors associated with the plurality of predefined symbol combinations;
• and
• decoding the first symbol of the received signal based, at least in part, on the first predefined symbol combination associated with the smallest frequency error.

A method comprising:

• determining, at a receiver of a wireless network device, a frequency associated with a first symbol of a received signal;
• generating, at each of a plurality of filters matched to a frequency response of the receiver for a corresponding each of a plurality of predefined symbol combinations, a frequency output associated with each of the plurality of predefined symbol combinations;
• determining a frequency error, associated with each of the plurality of predefined symbol combinations, that indicates a difference between the frequency output associated with each of the plurality of predefined symbol combinations and the frequency associated with the first symbol of the received signal;
• and
• determining whether to generate a symbol error notification based on comparing the frequency error associated with the each of the plurality of symbol combinations.