A simple block coding arrangement is created with symbols transmitted over a plurality of transmit channels, in connection with coding that comprises only simple arithmetic operations, such as negation and conjugation. The diversity created by the transmitter utilizes space diversity and either time or frequency diversity. Space diversity is effected by redundantly transmitting over a plurality of antennas, time diversity is effected by redundantly transmitting at different times, and frequency diversity is effected by redundantly transmitting at different frequencies: Illustratively, using two transmit antennas and a single receive antenna, one of the disclosed embodiments provides the same diversity gain as the maximal-ratio receiver combining (MRRC) scheme with one transmit antenna and two receive antennas. The principles of this invention are applicable to arrangements with more than two antennas, and an illustrative embodiment is disclosed using the same space block code with two transmit and two receive antennas.

Improved methods, systems, devices, or apparatus that support prioritization for potential shared data transmissions are described. In some cases, a receiving device may identify transmission parameters for shared transmissions including a scheduled shared transmission and determine resources for a potential shared transmission. The receiving device may monitor for the shared transmission(s) based on priority rules for a shared transmission and the potential shared transmission. For instance, the receiving device may be configured to receive only one of the scheduled or potential shared transmission. In some cases, the transmitting device may consider the priority rules and determine whether to transmit or drop one or more shared transmissions.

Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided. Variable rate codes are provided that combine various fixed rate codes in a manner that results in codes whose rates are dependent on all the various fixed rate codes that are combined.

A communication device according to the present invention is a communication device that wirelessly communicates with a counterpart communication device in a full-duplex mode using orbital angular momentum, and includes a second interference cancellation circuit that generates a replica of an interference signal received together with one or more signals transmitted from the counterpart communication device, on the basis of one or more signals to be transmitted to the counterpart communication device, and subtracts the replica from a received signal.

When transmitting signals from a plurality of base stations (broadcasting stations), the base stations include at least a first base station having a first antenna with a first polarization and a second base station having a second antenna with a second polarization that is different from the first polarization. Then, when the first base station transmits a signal β rom the first antenna having the first polarization, the second base station transmits the same signal as the first antenna of the first base station from a second antenna having the second polarization, at the same time.

Examples described herein include examples of wireless communication devices, systems, and methods which may employ multicarrier frequency division duplexing (multicarrier-FDD) techniques. Such techniques may enhance capacity and/or latency of example beamforming and MIMO systems. In some examples, the techniques described herein may be particularly advantageous in fast changing channels. Example channel duplexing techniques and methods described herein may achieve more efficient handling of fast fading channels by space-time adaptive (STAP) and/or adaptive array systems.

The present invention relates to a wireless communication system, and more particularly to a method and apparatus for monitoring a wireless link. A method for monitoring a wireless link by a terminal in a wireless communication system according to one embodiment of the present invention comprises the steps of: receiving a precoded control channel; and estimating the quality of the wireless link for the received precoded control channel, wherein the quality of the wireless link can be estimated on the basis of an assumption by the terminal regarding the precoding applied to the precoded control channel.

A method and an apparatus for implementing transmission diversity using a single transmitter in a wireless communication system are provided. The method of operating a transmitter for transmission diversity in a wireless communication system includes generating a first data symbol by receiving a baseband signal from a data source, generating a second data symbol having an equal phase to the first data symbol, generating a first complex conjugate symbol by performing a complex conjugate operation for the first data symbol, generating a second complex conjugate symbol having a phase difference of 180 degrees from the first complex conjugate symbol, transmitting the first data symbol through a first transmission antenna and transmitting the second data symbol through a second transmission antenna in a first time slot, and transmitting the first complex conjugate symbol through the first transmission antenna and transmitting the second complex conjugate symbol through the second transmission antenna in a second time slot.

A combined spatial and time multiplexer device is disclosed. The device organizes and selects any signal(s), including past data, from amongst a plurality of time division multiplexed (TDM) data streams. The data streams are collected by memory devices that are configured to separately store the multiplexed signals such that different time portions of the signals from each data stream are stored in different addressable sections. This allows for the current time data and past time data for a given signal to be selected and outputted by the device. According to an embodiment, each of the memory devices receives an address select signal and selects a signal group based on the address select signal. The device also includes a multiplexer that selects one of the signal groups from amongst the memory devices to output as the requested signal group.

When transmitting signals from a plurality of base stations (broadcasting stations), the base stations include at least a first base station having a first antenna with a first polarization and a second base station having a second antenna with a second polarization that is different from the first polarization. Then, when the first base station transmits a signal from the first antenna having the first polarization, the second base station transmits the same signal as the first antenna of the first base station from a second antenna having the second polarization, at the same time.