US 11,777,548 B1 · Context switching demodulator and symbol identifier

Abstract

A receiver concurrently demodulates data transmitted with a plurality of protocols. The receiver utilizes multiple and simultaneous protocol detections at preamble and/or packet payload phases. To provide robust detection and achieve fewer false detections, the receiver extends the cross correlation length once a short cross-correlation is valid. The receiver includes a first demodulator path and a second demodulator path with different filter bandwidths. The second demodulator path includes a decimator that reduces data by two. A correlator bank is coupled to the first and second demodulator paths and concurrently detects preamble symbols associated with a plurality of protocols. A first noise detector is coupled to the first demodulator path and a second noise detector is coupled to the second demodulator path. A first symbol identifier circuit is coupled to the first demodulator path and a second symbol identifier circuit coupled to the second demodulator path to provide packet payload symbol detection.

Claims20

Dependent claims

A receiver operable to demodulate data sent using a plurality of transmission protocols comprising:

a first demodulator path coupled to receive data from a receive path, the first demodulator path for data sent using either one of two transmission protocols of the plurality of transmission protocols, the first demodulator path including a first channel filter having a first bandwidth;
a second demodulator path for data sent using at least another transmission protocol of the plurality of transmission protocols, the second demodulator path including a decimator coupled to receive the data from the receive path and a second channel filter coupled to the decimator, the second channel filter having a second bandwidth lower than the first bandwidth;
and
a correlator bank coupled to the first and second demodulator paths to detect one or more preamble symbols associated with the plurality of transmission protocols.

1 more element

A method for concurrently demodulating transmissions sent using a plurality of protocols comprising:

supplying data generated in a receive path of a receiver to a first demodulator path and a second demodulator path;
filtering the data in a first channel filter in the first demodulator path to provide first demodulator path data, the first channel filter having a first bandwidth;
decimating and then filtering the data in a second channel filter in the second demodulator path to provide second demodulator path data, the second channel filter having a second bandwidth that is lower than the first bandwidth;
using the first demodulator path data for data that was sent using either one of at least two protocols of the plurality of protocols;
using the second demodulator path data for data that was sent using at least a third protocol of the plurality of protocols;
and
supplying first demodulator path data from the first demodulator path and second demodulator path data from the second demodulator path to a correlator bank to detect symbols associated with the plurality of protocols.

4 more elements

Dependencies are inferred from the claim text.

Context switching demodulator and symbol identifier

Life of this patent

Context switching demodulator and symbol identifier

Life of this patent

Abstract

Claims20