Adjacent and alternate channels power measurement apparatus

Details Adjacent and alternate channels power measurement apparatus Adjacent and alternate channels power measurement apparatus

1994-05-16

1995-12-12

Chin, Stephen

Pulse or digital communications

Testing

370 13, 370 17, 455 671, H04B 346, H04B 1700, H04B 120

Patent

active

054757096

ABSTRACT:
A signal processing unit selects signal components included in the frequency bands of respective channels from a burst signal input from a terminal, and outputs the selected signal components to a memory after they are converted into digital data. A frequency switching unit sequentially switches the frequency bands at a predetermined time interval in correspondence with the respective channels. A data write unit stores the digital data in the memory for every channel in response to switching of the frequency bands. A data read-out unit reads out data from the memory, specifies the timing of the burst signal, and reads out necessary data for every channel on the basis of the specified timing. A power arithmetic operation unit calculates electric power of each channel based on the readout data, thus obtaining the adjacent and alternate channels power.

REFERENCES:
patent: 4317206 (1982-02-01), Nossen
patent: 4408322 (1983-10-01), Chadwick et al.
patent: 4606019 (1986-08-01), Takai
patent: 4932075 (1990-06-01), Dmitrijevic et al.
patent: 5303262 (1994-04-01), Johnson
IEC Standard Publication 489-2; "Methods of Measurement for Radio Equipment Used in the Mobile Services"; 1978; Geneva, Switzerland; pp. 25, 27.
EIA/TIA Interim Standard; "Recommended Minimum Performance Standards for 800 MHz Dual Mode Mobile Station"; Dec. 1991.
.mu. PD77240 Digital Signal Processor (DSP) User's Manuals; NEC Corporation; 1990).

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