In a multi-user communication system, a pre-coder in a transmitter comprises a Discrete
Fourier Transform (DFT) spreader configured to spread reference-signal symbols with …

An OFDM transmitter spreads original data symbols with a complex-valued spreading matrix
derived from a discrete Fourier transform. Spread data symbols are mapped to OFDM …

US7430257B1 - Multicarrier sub-layer for direct sequence channel and multiple-access coding
- Google Patents US7430257B1 - Multicarrier sub-layer for direct sequence channel and …

US7593449B2 - Multicarrier sub-layer for direct sequence channel and multiple-access coding
- Google Patents US7593449B2 - Multicarrier sub-layer for direct sequence channel and …

US7965761B2 - Multicarrier sub-layer for direct sequence channel and multiple-access
coding - Google Patents US7965761B2 - Multicarrier sub-layer for direct sequence channel …

Frequency translation and applications of same are described herein, including wireless
local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such …

A software defined radio (SDR) virtualizes physical-layer processing operations of a radio
access network (RAN) communication standard. The SDR comprises multiple components …

Wireless Location System (WLS) whereby existing Advanced Mobile Phone System (AMPS)
Frequency Divi sion Multiple Access (FDMA) Cellular Telephones (CTs) can be located …

US10200227B2 - Pre-coding in multi-user MIMO - Google Patents US10200227B2 - Pre-coding
in multi-user MIMO - Google Patents Pre-coding in multi-user MIMO Download PDF Info …

Methods, systems, and apparatuses, and combinations and sub-combinations thereof, for
down-converting and up-converting an electromagnetic (EM) signal are described herein …