US PATENT DOCUMENTS nals, fast acknowledgment, and quick resource assignments.
Calibration may be performed to account for differences in the frequency responses of …

Provided is a method and apparatus for determining a downlink beamforming vector in a
hierarchical cell communication system. Small base stations may determine transmit …

Pilots suitable for use in MIMO systems and capable of supporting various functions are
described. The various types of pilot include—a beacon pilot, a MIMO pilot, a steered …

A MIMO system supports multiple spatial multiplexing modes for improved performance and
greater flexibility. These modes may include (1) a single-user steered mode that transmits …

In a single-carrier frequency division multiple access (SC FDMA) system that utilizes
interleaved FDMA (IFDMA) or localized FDMA (LFDMA), a transmitter generates modula tion …

Closed-loop rate control for data transmission on multiple parallel channels is provided. An
inner loop estimates the channel conditions for a communication link and selects a suitable …

Related U s A lication Data A channel structure has at least tWo channel sets. Each chan''PP
nel set contains multiple channels and is associated With a (60) Provisional application No …

(57) ABSTRACT A multiple-access MIMO WLAN system that employs MIMO, OFDM, and
TDD. The system (1) uses a channel structure With a number of con? gurable transport …

5,604,744 A 2, 1997 Andersson et al. w 5,612,978 A 3, 1997 Blanchard etal 6,483,820 B1
11/2002 Davidson et al. wk 4 6,487.243 B1 11, 2002 H tal. 5,625,876 A 4, 1997 …

Methods and apparatuses are disclosed for providing flexible channel information feedback.
In some cases this may be according to reporting types assigned by one or more sectors …