Systems relating to ultra wideband broad casting comprising dynamic frequency and bandwidth hopping
This invention relates to ultra wideband wireless communications and more particularly communications systems exploiting mixerless transmitters and energy based receivers. The transmitter as an impulse radio with dynamic frequency and bandwidth hopping for dynamic setting of emitted power spectrum density. The receiver performs dynamic configuration by performing receipt of a wireless training pulse sequence.
1. A receiver for an impulse radio receiver comprising:
a radio frequency (RF) receiver chain coupled to an antenna for processing RF signals received by the antenna comprising at least an energy detection circuit; wherein
the RF receiver chain supports dynamic configuration to receive data encoded with a pulse based encoding scheme of a plurality of pulse based encoding schemes;
the receiver analyzes an output of an integrator during a start-up process during which the receiver receives a training sequence from an impulse radio transmitter in order to tune at least one reference level for a comparator circuit; and
the receiver sends the output of the comparator circuit to a flip-flop clocked on the ending edge of an integration window signal allowing the comparator to be power cycled between readings.
2. The receiver according to claim 1 , wherein
the encoding scheme of a plurality of pulse based encoding schemes comprises encoding data such that each bit transmitted is comprised of a plurality N pulses wherein each pulse of the N pulses is at a predetermined frequency of a plurality M frequencies, has a predetermined amplitude, and has a predetermined pulse length; wherein
N≥2;
M≥2; and
M and N are integers.
3. The receiver according to claim 1 , further comprising
a power management circuit which:
supports operation of the receiver at a plurality of utilizations wherein at utilizations lower than 100% selected portions of the receiver are powered down to lower the power consumption of the receiver; and
starts an integrator forming part of the energy detection circuit during power up in a known state.
4. A radio system communicating over a wireless link comprising:
a transmitter supporting operation as an impulse radio comprising:
a radio frequency (RF) signal generator for encoding data to be transmitted, the RF signal generator coupled to an RF antenna and a control circuit; and
the control circuit for controlling the generation of the encoded data such that each bit being transmitted is comprised of a plurality N pulses wherein each pulse of the N pulses is at a predetermined frequency of a plurality M frequencies, has a predetermined amplitude, and has a predetermined pulse length; wherein
N≥2;
M≥2; and
M and N are integers; and
a receiver supporting operation as an impulse radio receiver comprising:
a radio frequency (RF) receiver chain coupled to an antenna for processing RF signals received by the antenna comprising at least an energy detection circuit; wherein
the RF receiver chain supports dynamic configuration to receive data encoded with a plurality of pulse based encoding schemes of which the pulse based encoding of the transmitter is one such pulse based encoding scheme;
the receiver analyzes an output of an integrator during a start-up process during which the receiver receives a training sequence from an impulse radio transmitter in order to tune at least one reference level for a comparator circuit; and
the receiver sends the output of the comparator circuit to a flip-flop clocked on the ending edge of an integration window signal allowing the comparator to be power cycled between readings.
5. A device comprising:
a transmitter supporting operation as an impulse radio comprising:
a radio frequency (RF) signal generator for encoding data to be transmitted, the RF signal generator coupled to an RF antenna and a control circuit; and
the control circuit for controlling the generation of the encoded data such that each bit being transmitted is comprised of a plurality N pulses wherein each pulse of the N pulses is at a predetermined frequency of a plurality M frequencies, has a predetermined amplitude, and has a predetermined pulse length; wherein
N≥2;
M≥2; and
M and N are integers; and
a receiver supporting operation as an impulse radio receiver comprising:
a radio frequency (RF) receiver chain coupled to an antenna for processing RF signals received by the antenna comprising at least an energy detection circuit; wherein
the RF receiver chain supports dynamic configuration to receive data encoded with a plurality of pulse based encoding schemes of which the pulse based encoding of the transmitter is one such pulse based encoding scheme;
the receiver analyzes an output of an integrator during a start-up process during which the receiver receives a training sequence from an impulse radio transmitter in order to tune at least one reference level for a comparator circuit; and
the receiver sends the output of the comparator circuit to a flip-flop clocked on the ending edge of an integration window signal allowing the comparator to be power cycled between readings;
a first power control circuit selectively powering up and powering down predetermined portions of the transmitter in dependence upon the data being transmitted; and
a second power control circuit selectively powering up and powering down predetermined portions of the receiver in dependence upon the data being received.
6. The device according to claim 5 , wherein
the RF signal generator employs biphasic phase scrambling such that each transmitted pulse has either a first phase and a second phase, wherein
the sequence of phases is pseudo-random; and
sequential pulses within the plurality of N pulses are at least one of different frequencies and different phases.