By Arthur H.M. Ross, Ph.D.

CDMA is a complex concept that can be viewed at many levels. We intend to offer explanations suitable for a broad audience, from non-technical to expert.

Introduction to CDMA
... if you are totally new to this technology!

Multiple Access Wireless Communications
An overview of the traditional systems - the old way . . .

The CDMA Revolution
CDMA approaches optimal use of the electromagnetic spectrum. Extraordinary capacity is its hallmark!

Principles of CDMA
CDMA is a form of Direct Sequence Spread Spectrum (DSSS) - What does that mean?

The Air Interface
The common air interface is the common ground on which equipment manufacturers and operators must agree. These pages survey the cellular (TIA/EIA/IS-95A) and PCS (ANSI J-STD-008) air interface standards.