Title:
受信信号を復調する方法および受信機
Document Type and Number:
Japanese Patent JP3761895
Kind Code:
B2
Abstract:
A method and receiver for demodulating a DS/CDMA signal increases a receiver's (60) sensitivity and as a result the system capacity of a DS/CDMA cellular communications system. A Reduced State Sequence Estimator (RSSE) (68) finds a path (210) with the highest energy. An efficient method and apparatus for determining the path energies (212) selects a new path (210) to differ from a previous path (210) by a single reduced state (200). A difference (306) between an I and Q magnitude of the new and omitted reduced state (200) is computed (304). This difference is added to the previous path's total I (308) and Q magnitude, to compute the new path's I and Q magnitude. These I and Q magnitudes are used to compute a path energy (322) and the highest path's energy (326) is used to select the best path for decoding (70).
Inventors:
Lipa, Robert A
Hollowbeck, Kevin Joseph
Hollowbeck, Kevin Joseph
Application Number:
JP52622396A
Publication Date:
March 29, 2006
Filing Date:
December 14, 1995
Export Citation:
Assignee:
MOTOROLA INCORPORATED
International Classes:
H04B1/707; H04J13/00; H04W84/10; H04W88/02; H04W88/08; H04J11/00
Domestic Patent References:
| JP6097913A | ||||
| JP10508455A | ||||
| JP9500245A | ||||
| JP8507185A | ||||
| JP7508383A |
Foreign References:
| US5465269 |
Other References:
Rod Walton, Mark Wallace, Near Maximum Likelihood for M-ary Orthogonal Signalling, Vehicular Technology Conference,1993 IEEE 43rd, 1993年 5月20日,pp.5-8
Attorney, Agent or Firm:
Mamoru Kuwagaki
Shinsuke Onuki
Masanori Honjo
Shinsuke Onuki
Masanori Honjo