JPH0454033A - Frequency hopping transmitter - Google Patents

Frequency hopping transmitter

Info

Publication number
JPH0454033A
JPH0454033A JP16379290A JP16379290A JPH0454033A JP H0454033 A JPH0454033 A JP H0454033A JP 16379290 A JP16379290 A JP 16379290A JP 16379290 A JP16379290 A JP 16379290A JP H0454033 A JPH0454033 A JP H0454033A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
frequency
signal
chip
pass filter
fh
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP16379290A
Inventor
Masao Oba
Takahiko Takeuchi
Original Assignee
Tokimec Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Abstract

PURPOSE: To realize high speed FH changeover by generating a frequency signal different from a frequency hopping pattern of a Reed Solomon code or the like by means of a DDS system using a ROM table continuously while switching the signal for each chip period.
CONSTITUTION: An angular velocity data ωi from an FH code generator 10 is added to a value already added which is stored in a register 14 at an adder 12 to obtain an angle data ωit. A sinusoidal data generated from a sinusoidal wave conversion ROM table 16 is converted into an analog sinusoidal wave signal by a D/A converter 18 and given to a low pass filter(LPF) 20. Phase distortion of a signal waveform of each chip frequency component is eliminated by using an SAE filter with an excellent group delay characteristic as a band pass filter 26 to minimize the waveform distortion for each chip frequency and to ensure the demodulation of the chip frequency at the receiver side.
COPYRIGHT: (C)1992,JPO&Japio
JP16379290A 1990-06-21 1990-06-21 Frequency hopping transmitter Pending JPH0454033A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16379290A JPH0454033A (en) 1990-06-21 1990-06-21 Frequency hopping transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16379290A JPH0454033A (en) 1990-06-21 1990-06-21 Frequency hopping transmitter

Publications (1)

Publication Number Publication Date
JPH0454033A true true JPH0454033A (en) 1992-02-21

Family

ID=15780790

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16379290A Pending JPH0454033A (en) 1990-06-21 1990-06-21 Frequency hopping transmitter

Country Status (1)

Country Link
JP (1) JPH0454033A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599500A2 (en) * 1992-11-20 1994-06-01 Ntt Mobile Communications Network Inc. Frequency diversity transmitter and receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0599500A2 (en) * 1992-11-20 1994-06-01 Ntt Mobile Communications Network Inc. Frequency diversity transmitter and receiver
EP0599500A3 (en) * 1992-11-20 1995-01-25 Nippon Telegraph & Telephone Frequency diversity transmitter and receiver.

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