Wi-LAN散彈打鳥，一次告8家

加拿大公司Wi-LAN於2011.9.1.在東德州聯邦法院控告Apple等9家公司侵害其CDMA、HSPA相關技術的專利及Wi-Fi、LTE的技術專利。
根據報導，Wi-LAN目前擁有約1400件專利組合，授權約有250家公司。

本案的被告群
APPLE, INC.
ALCATEL-LUCENT USA INC.
DELL, INC.
HEWLETT-PACKARD COMPANY
HTC AMERICA, INC.
KYOCERA INTERNATIONAL, INC.
KYOCERA COMMUNICATIONS, INC.,
NOVATEL WIRELESS, INC.
SIERRA WIRELESS AMERICA, INC.

RE37,802
Title : Multicode direct sequence spread spectrum
Filing Date : 1998.9.10.
Issue Date : 2002.7.23.
Abstract :
In this patent, we present MultiCode Direct Sequence Spread Spectrum (MC-DSSS) which is a modulation scheme that assigns up to N DSSS codes to an individual user where N is the number of chips per DSSS code. When viewed as DSSS, MC-DSSS requires up to N correlators (or equivalently up to N Matched Filters) at the receiver with a complexity of the order of N.sup.2 operations. In addition, a non ideal communication channel can cause InterCode Interference (ICI), i.e., interference between the N DSSS codes. In this patent, we introduce new DSSS codes, which we refer to as the \"MC\" codes. Such codes allow the information in a MC-DSSS signal to be decoded in a sequence of low complexity parallel operations which reduce the ICI. In addition to low complexity decoding and reduced ICI. MC-DSSS using the MC codes has the following advantages: (1) it does not require the stringent synchronization DSSS requires, (2) it does not require the stringent carrier recovery DSSS requires and (3) it is spectrally efficient.

US5,282,222
Title : Method and apparatus for multiple access between transceivers in wireless communications using OFDM spread spectrum
Filing Date : 1992.3.31.
Issue Date : 1994.1.25.
Abstract :
A method for allowing a number of wireless transceivers to exchange information (data, voice or video) with each other. A first frame of information is multiplexed over a number of wideband frequency bands at a first transceiver, and the information transmitted to a second transceiver. The information is received and processed at the second transceiver. The information is differentially encoded using phase shift keying. In addition, after a pre-selected time interval, the first transceiver may transmit again. During the preselected time interval, the second transceiver may exchange information with another transceiver in a time duplex fashion. The processing of the signal at the second transceiver may include estimating the phase differential of the transmitted signal and pre-distorting the transmitted signal. A transceiver includes an encoder for encoding information, a wideband frequency division multiplexer for multiplexing the information onto wideband frequency voice channels, and a local oscillator for upconverting the multiplexed information. The apparatus may include a processor for applying a Fourier transform to the multiplexed information to bring the information into the time domain for transmission.