Orthogonal signaling for CDMA

摘要

The present invention uses a portion of an orthogonal spreading code space in a CDMA spectrum for uplink from a user element to a base station. By assigning the user elements one or more codes, which are orthogonal to those used to spread data, to use for uplink , the present invention significantly reduces interference between channels, and between the data channels and the channels, while supporting additional capacity. The codes may be individually assigned to user elements or assigned to groups of user elements. Further, different length codes may be assigned to the user elements to support different rates depending on Quality of Service (QoS) requirements.

主权项

1. A method for code division multiple access (CDMA) communication comprising:
a) assigning a data code to a user element for the user element to use when transmitting data; and b) assigning a system access code to the user element for the user element to use when transmitting system access information, the data code and system access code being mutually orthogonal and respectively defining data and system access channels for the user element.