Frame structures, transmitters, and receivers utilizing dual subcarriers for signal adjustment

A method comprising:

• encode data bits into transport block bits;
• divide the transport block bits into one or more resource blocks;
• and
• for each resource block:
• modulate the bits of the resource block onto a first set of subcarriers designated as payload subcarriers;
• select a subset of the bits of the resource block that are mapped to a subset of payload subcarriers, such subcarriers being designated as upper dual subcarriers;
• encode said subset of bits thereby forming dual systematic bits and dual check bits;
• modulate the dual check bits onto a second set of subcarriers designated as lower dual subcarriers;
• a third set of subcarriers comprising the upper dual subcarriers and the lower dual subcarriers and designated as dual subcarriers and
• transmit the payload subcarriers and the lower dual subcarriers.

A method of implementing a digital signal locked-loop comprising:

• for each resource block:
• performing a complex multiplication of a first set of one or more complex received samples by a rotation phasor thereby forming rotated dual samples;
• performing a complex multiplication of a second set of one or more complex received samples by the rotation phasor thereby forming rotated payload samples;
• comparing the rotated dual samples with ideal dual samples thereby forming a complex product domain error phasor;
• subtracting 1 from the complex product domain error phasor thereby forming a linear domain error phasor;
• passing the linear domain error phasor through a loop filter having an integrator thereby forming a linear phase correction sample;
• adding 1 to the linear phase correction sample thereby forming a product domain phase sample;
• and
• passing the product domain phase sample through a product domain integrator thereby forming the next rotation phasor.