Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Multicode direct sequence spread spectrum










Image Number 19 for United States Patent #RE37802.

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.








 
 
  Recently Added Patents
Information recording medium and information processing method for accessing content with license or copyright protection
1,3-diiodohydantoin compound and production method thereof
Piperazinyl methyl phenyl cyclohexane compound
Monitoring agent programs in a distributed computing platform
Enzymatic demethylation of flavonoids
Idle stop and go system and method for controlling thereof
Imaging lens with three lens elements, and electronic apparatus having the same
  Randomly Featured Patents
Functionalized polymer and method to obtain functionalized polymer
Multi-layer system for scalable hosting platform
Semiconductor device
Tungsten plug deposition quality evaluation method by EBACE technology
Method and apparatus for allocating radio resource using random access procedure in a mobile communication system
Angle panel
Cylinder head gasket construction
Automotive active suspension system for regulating vehicular height level during anti-rolling control
Roofing rail transportation system
Beverage cooler box