System and method for setting link parameters in a wifi link

A system comprising a WiFi transmitter comprising a processing circuit, the processing circuit being configured to:

• adjust a respective estimated signal to interference and noise ratio for each of a plurality of combinations of spatial stream numbers and bandwidths;
• determine a modulation and coding scheme for each of the plurality of combinations;
• estimate a plurality of throughputs, each corresponding to a respective one of the plurality of modulation and coding schemes;
• select a maximum throughput from the plurality of throughputs;
• and
• transmit data according to the modulation and coding scheme, spatial stream number, and bandwidth associated with the maximum throughput.

A system comprising a WiFi transmitter comprising means for processing, the means for processing being configured to:

• transmit a first quantity of data, using a first number of spatial streams, and a first bandwidth;
• receive N1 acknowledgment signals, N1 being a nonnegative integer;
• receive N2 negative acknowledgment signals, N2 being a nonnegative integer;
• adjust an estimated signal to interference and noise ratio for the first number of spatial streams and the first bandwidth, based on N1 and N2;
• estimate a first throughput for the first number of spatial streams and the first bandwidth;
• estimate a second throughput for a second number of spatial streams and a second bandwidth;
• determine whether the second throughput exceeds the first throughput;
• and
• in response to determining that the second throughput exceeds the first throughput, transmit a second quantity of data, using the second number of spatial streams, and the second bandwidth.