Optical orthogonal codes
WebOrthogonal codes have a cross-correlation equal to zero; in other words, they do not interfere with each other. In the case of IS-95, 64-bit Walsh codes are used to encode the signal to separate different users. Since each of the 64 Walsh codes is orthogonal to all other, the signals are channelized into 64 orthogonal signals. http://www.ijsrp.org/research_paper_may2012/ijsrp-may-2012-26.pdf
Optical orthogonal codes
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WebThe invention discloses an optical-waveguide display module with multiple light sources, including a light-source array of timing-orthogonal-characteristic, a relay device, a display device of orthogonal-characteristic, an optical waveguide device, a converging device, a control device, and other components. The light-source array of timing-orthogonal …
WebMar 27, 2024 · Abstract: We present the application of optical code division multiple access (OCDMA) modulation based on optical orthogonal codes for automotive time-of-flight light detection and ranging (LiDAR) system sensors using avalanche photodiode (APD) detectors. The modulation opens the possibility to discriminate single laser transmissions. WebSeveral new constructions for optimal optical orthogonal codes with weight k/spl ges/4 and correlation constraints /spl lambda//sub a/=/spl lambda//sub c/=1 are described by means …
Web当前位置： 文档下载 > 所有分类 > Optical Orthogonal Codes and Arcs in PG(d,q) Optical Orthogonal Codes and Arcs in PG(d,q) We present a new construction for (n,w,λ)-optical orthogonal codes (OOCs). The construction is pleasingly simple, where codewords correspond to arcs, specifically normal rational curves. Moreover, our ... WebThe exact number of codewords of an optimal $ 2 $-D $ (n\times m,3,2,1) $-optical orthogonal code is determined for $ n = 2 $, $ m\equiv 1 \pmod{2} $, and $ n\equiv 1 …
WebMultilength variable-weight optical orthogonal codes (MLVWOOCs) are recently proposed for supporting multirate and integrated multimedia services in optical code division multiple access (OCDMA) networks. Some work had been done on MLVWOOCs with weight set W …
WebAbstract—This correspondence introduces a new orthogonal forward regression (OFR) model identification algorithm using D-optimality for model structure selection and is based on an M-estimators of parameter estimates. M-estimator is a classical robust par. chu4ns eatonWebThe study of optical orthogonal codes is motivated by an application in optical code-division multiple-access communication systems. In this paper, upper bounds on the size of an optical orthogonal code are discussed. desert meadows 1 hoa green valley azWebAn optical orthogonal code (n,w,λa ,λc) is a family C of (0,1) sequences of length n with constant Hamming weight w satisfying the following two properties: 1. Autocorrelation … desert medical rejuvenation rancho mirageWebDec 31, 2014 · Variable-weight optical orthogonal code (OOC) was introduced by Yang for multimedia optical CDMA systems with multiple quality of service (QoS) requirements. It … chu2 english subbedWebNew families of three-dimensional (3-D) optical orthogonal codes for applications to optical code-division multiple access (OCDMA) networks are proposed and shown to be … chua aik boonWebJul 1, 2011 · Variable-weight optical orthogonal code (OOC) was introduced by Yang for multimedia optical CDMA systems with multiple quality of service (QoS) requirements. In this paper, four general constructions for optimal cyclic packings and optimal variable-weight OOCs are presented. Many new infinite classes of optimal (v, W,1,Q)-OOCs are … chu4s eatonWebOrthogonal Codes for Incoherent Optical CDMA Systems Ivan B. Djordjevic and Bane Vasic, Senior Member, IEEE Abstract— Three novel classes of optical orthogonal codes (OOCs) based on combinatorial designs are proposed. They are applicable to both synchronous and asynchronous incoherent optical code-division multiple access (OCDMA) and compatible chu 5 letter words