Methods and apparatus for wireless communication in systems such as omni-beam and narrow-beam fixed wireless loop (FWL) systems. In a first technique in accordance with the invention, referred to as code division duplex (CDD) time-slotted CDMA, uplink and downlink portions of the system are separated...http://www.google.es/patents/US7020071?utm_source=gb-gplus-sharePatente US7020071 - Methods and apparatus for wireless communication using orthogonal frequency division multiplexing
Methods and apparatus for wireless communication using orthogonal frequency ...
