Radio apparatus capable of detecting field intensity
AssigneeNEC Corporation
InventorKenji Seki
Life of this patent
Estimating the term…
Abstract
A radio apparatus has a detector for detecting the electric field intensity of a test signal received from the other radio apparatus. The detector produces a mean value of the field intensity detected at a predetermined interval and outputs the resulting latest field intensity level signal to a memory circuit. Further, the detector sequentially compares the latest field intensity level signal with a plurality of intensity level signals stored in the memory circuit and thereby delivers a decision signal to a display. In response, the display displays a detailed positional relation between the two radio apparatuses.
Claims8
A radio system comprising:
- a first radio apparatus;
- and
- a second radio apparatus;
- said first radio apparatus comprising;
- detecting means for detecting an electric field intensity of a signal received from said second radio apparatus to thereby output a field intensity signal;
- first averaging means for calculating a mean value of said field intensity signal at a predetermined interval to thereby output a latest field intensity level signal;
- first storing means for storing a plurality of predetermined field intensity level signals;
- first comparing means for sequentially comparing said latest field intensity level signal with said plurality of field intensity level signals to thereby output a decision signal representative of a result of comparison;
- first displaying means for displaying, based on said decision signal, a positional relation between said first and second radio apparatuses;
- and
- first transmitting means for transmitting said field intensity signal to said second radio apparatus;
- said second radio apparatus comprising:
- second averaging means for calculating a mean value of said field intensity signal from said first radio apparatus at a predetermined interval to output said latest field intensity level signal;
- second storing means for storing a plurality of predetermined field intensity level signals;
- second comparing means for sequentially comparing said latest field intensity level signal with said plurality of field intensity level signals stored in said second storing means to thereby output a decision signal outputted from said second comparing means representative of a result of comparison;
- second displaying means for displaying, based on said decision signal, a positional relation between said first and second radio apparatuses;
- and
- second transmitting means for transmitting said signal to said first radio apparatus.
A method of displaying a positional relation between a first radio apparatus and a second radio apparatus, said method comprising the steps of:
- transmitting a signal from said second radio apparatus to said first radio apparatus;
- detecting an electric field intensity of said signal at said first radio apparatus to thereby output a field intensity detection signal;
- calculating at said first radio apparatus a mean value of said field intensity detection signal at a predetermined interval to thereby output a latest field intensity level signal;
- comparing at said first radio apparatus said latest field intensity level signal with a plurality of predetermined field intensity level signals to thereby output a decision signal representative of a result of comparison;
- displaying, based on said decision signal, a positional relation between said first and second radio apparatuses at said first radio apparatus;
- transmitting said field intensity detection signal from said first radio apparatus to said second radio apparatus;
- calculating at said second radio apparatus a mean value of said field intensity detection signal at a predetermined interval to thereby output said latest field intensity level signal;
- comparing at said second radio apparatus said latest field intensity level signal with said plurality of field intensity level signals stored in said second radio apparatus to thereby output a decision signal representative of a result of comparison;
- and
- displaying a positional relation between said first and second radio apparatuses at said second radio apparatus.
Dependencies are inferred from the claim text.