Selective data inversion in ultra-wide-band communications to eliminate line frequencies
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShaomin S. Mo, Alexander D. Gelman, Jayaram Gopal
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Abstract
A method for generating an ultra-wide-band (UWB) having a reduced discrete frequency component defines frame synchronization signal and an inverted frame synchronization signal. As each frame is generated, the method randomly selects the frame synchronization signal or the inverted frame synchronization signal to be included with the frame. The frame synchronization signal is detected by a correlator and the magnitude of the correlation is used to indicate the detection of the frame synchronization signal.
Claims6
A method for generating a pulse signal modulated by a data signal including at least one repetitive data pattern, wherein the modulated signal has a reduced discrete frequency component resulting from the repetitive data pattern, the method comprising the steps of:
- locating instances of the repetitive pattern in the data signal before it is used to modulate the pulse signal;
- randomly inverting ones of the instances to form a modified data signal;
- and
- modulating the pulse signal with the modified data signal.
A method for generating an ultra-wide-band (UWB) signal including a plurality of frames each frame including a frame synchronization signal, the method including the steps of:
- defining a frame synchronization signal and an inverted frame synchronization signal;
- as each frame is generated, selecting a respective datum from a random data-stream, the selected datum having substantially equal probability of having a first value or a second value;
- assigning the frame synchronization signal to the frame if the respective selected datum has the first value and assigning the inverted frame synchronization signal to the frame if the selected datum has the second value.
Dependencies are inferred from the claim text.