Device, system, and method of resource allocation in a wireless network

An apparatus for wireless communication in a power-limited, very wideband system, the apparatus comprising:

• a wireless communication device having a media access controller (MAC) and a physical layer (PHY) that are adapted for a multiple-input-multiple-output (MIMO) orthogonal frequency-division multiple access (OFDMA) communication scheme in a power-limited wideband system;
• a plurality of antennas, operationally coupled to said device, to send and receive wireless communication signals according to said MIMO-OFDMA communication scheme;
• and
• a resource allocator, to allocate transmission resources of said device into desired MIMO channels optimized according to at least one of signal-to-noise ratio (SNR), bandwidth, number of users, and signal-to-noise-plus-interference ratio (SINR), wherein said resource allocator includes a superposition coder to allocate a wideband channel to a small number of strong wideband users together with a greater number of weak narrowband users.