公开(公告)号：US2682575A

公开(公告)日：1954-06-29

申请号：US55935444

申请日：1944-10-19

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: H04J3/00

CPC classification number: H04J3/00

公开(公告)号：US2520534A

公开(公告)日：1950-08-29

申请号：US61128345

申请日：1945-08-18

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: H04B7/17

CPC classification number: H04B7/17

公开(公告)号：US2927967A

公开(公告)日：1960-03-08

申请号：US68985757

申请日：1957-10-14

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: H04B3/18 ,  H04J3/20

CPC classification number: H04J3/20 ,  H04B3/18

公开(公告)号：US2909675A

公开(公告)日：1959-10-20

申请号：US50728055

申请日：1955-05-10

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: H03K5/00

CPC classification number: H03K5/00006

公开(公告)号：US2614142A

公开(公告)日：1952-10-14

申请号：US16436350

申请日：1950-05-26

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: H03K3/313

CPC classification number: H03K3/313

公开(公告)号：US2542644A

公开(公告)日：1951-02-20

申请号：US4717948

申请日：1948-09-01

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: H03K23/82

CPC classification number: H03K23/82

公开(公告)号：US2451480A

公开(公告)日：1948-10-19

申请号：US72547647

申请日：1947-01-31

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O ,  TERRY DONALD M

IPC: H03B19/12

CPC classification number: H03B19/12

公开(公告)号：US2224673A

公开(公告)日：1940-12-10

申请号：US22264838

申请日：1938-08-02

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: H03G7/02

CPC classification number: H03G7/02

公开(公告)号：US3584781A

公开(公告)日：1971-06-15

申请号：US3584781D

申请日：1968-07-01

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: G06F17/14 ,  G06F7/38

CPC classification number: G06F17/142

Abstract: Methods and apparatus for generating Fourier series coefficients by fast Fourier transform techniques are disclosed. When the input sequence to be transformed includes only real-valued signals, important savings of storage and computation time are realized through the elimination of conjugate results. Instead, only one of a pair of conjugate final results, and the intermediate results leading to them, are explicitly generated; the remaining results are derived by selective conjugation. Techniques for facilitating the computing methods by selective reordering and accessing are also described.

公开(公告)号：US2799006A

公开(公告)日：1957-07-09

申请号：US34443753

申请日：1953-03-24

Applicant: BELL TELEPHONE LABOR INC

Inventor： EDSON JAMES O

IPC: H01P3/18

CPC classification number: H01P3/18