Patent Number: 6,167,079

Title: Method for identifying data transmission rate, and a receiver

Abstract: A method and receiver for identifying data transmission rate from a signal which has several transmission rate alternatives. The signal contains modulation symbols (201 to 206) which are formed as a vector and which are submatrices of a known, essentially orthogonal transform matrix selected on the basis of a combination of bits to be transmitted. A correlation is formed between a received modulation symbol (201 to 206) and the known modulation matrix, as a result of which correlation vectors (301 to 306) are produced, each correlation vector being composed of correlation values (311) which are used to detect the signal. By utilizing the correlation values (311) of one or more correlation vectors (301 to 306), an estimate (556) is formed for each data transmission rate representing the probability of the data transmission rate of the signal, and the estimates (556) are used to select the most probable data transmission rate to be used for detecting the signal.

Inventors: Kinnunen; Pasi (Oulu, FI), Keskitalo; Ilkka (Oulu, FI)

Assignee: Nokia Telecommunications Oy

International Classification: H04L 1/00 (20060101); H04L 25/02 (20060101); H04B 003/46 (); H04B 017/00 (); H04Q 001/20 ()

Expiration Date: 12/26/2013