Methods and apparatus for common scrambling for rank adaptation

A transmitter, comprising:

• a memory comprising instructions;
• a transceiver;
• and
• one or more processors operatively coupled with the memory and the transceiver, the one or more processors configured to execute instructions in the memory to:
• identify an initial rank;
• modulate information into a first plurality of layers associated with the initial rank;
• scramble the first plurality of layers by a first common scrambler to generate a first plurality of scrambled layers;
• transmit, to the receiver, the first plurality of scrambled layers;
• receive an indication of failed demodulation of a portion of the first plurality of scrambled layers;
• modulate at least a portion of the information into a second plurality of layers, wherein the second plurality of layers includes a same number of layers as the first plurality of layers;
• scramble the second plurality of layers by a second common scrambler to generate a second plurality of scrambled layers;
• and
• transmit, to the receiver, the second plurality of scrambled layers.

A non-transitory computer readable medium having instructions stored therein that, when executed by one or more processors of a transmitter, cause the one or more processors to:

• identify an initial rank;
• modulate information into a first plurality of layers associated with the initial rank;
• scramble the first plurality of layers by a first common scrambler to generate a first plurality of scrambled layers;
• transmit, to the receiver, the first plurality of scrambled layers;
• receive an indication of failed demodulation of a portion of the first plurality of scrambled layers;
• modulate at least a portion of the information into a second plurality of layers, wherein the second plurality of layers includes a same number of layers as the first plurality of layers;
• scramble the second plurality of layers by a second common scrambler to generate a second plurality of scrambled layers;
• and
• transmit, to the receiver, the second plurality of scrambled layers.

A transmitter, comprising:

• means for identifying an initial rank;
• means for modulating information into a first plurality of layers associated with the initial rank;
• means for scrambling the first plurality of layers by a first common scrambler to generate a first plurality of scrambled layers;
• means for transmitting, to the receiver, the first plurality of scrambled layers;
• means for receiving an indication of failed demodulation of a portion of the first plurality of scrambled layers;
• means for modulating at least a portion of the information into a second plurality of layers, wherein the second plurality of layers includes a same number of layers as the first plurality of layers;
• means for scrambling the second plurality of layers by a second common scrambler to generate a second plurality of scrambled layers;
• and
• means for transmitting, to the receiver, the second plurality of scrambled layers.