Method and apparatus for power control in an ultra wideband impulse radio system

#1. Field of the Invention

#The present invention generally relates to wireless communications, and more specifically, to a system and a method for impulse radio power control.

#2. Related Art

#Within the accompanying drawings, the convention used to describe signal connections requires that a signal line end at a junction with another signal line to indicate a connection. Two signal lines that cross indicate no connection at the crossing. The present invention will now be described with reference to the accompanying drawings, wherein:

#FIG. 1A illustrates a representative Gaussian Monocycle waveform in the time domain;

#FIG. 1B illustrates the frequency domain amplitude of the Gaussian Monocycle of FIG. 1A;

#In the drawings, like reference numbers generally indicate identical, functionally similar, and/or structurally similar elements. The drawing in which an element first appears is indicated by the leftmost digit(s) in the corresponding reference number.

#1 Table of Contents I. Impulse Radio Basics I.1. Waveforms I.2. Pulse Trains I.3. Coding for Energy Smoothing and Channelization I.4. Modulation I.5. Reception and Demodulation I.6. Interference Resistance I.7. Processing Gain I.8. Capacity I.9. Multipath and Propagation I.10. Distance Measurement II. Exemplary Transceiver Implementation II.1. Transmitter II.2. Receiver III. Overview IV. Power Control Process IV.1. Power Control Overview IV.2. Impulse Radio Performance Measurements IV.2.a. Signal Strength Measurement IV.2.b. Noise Measurement IV.2.c. Bit Error Rate (BER) IV.2.d. Performance Measurement Summary IV.3. Impulse Radio Power Control IV.3.a. Calculate Power Control Update i. Using Signal Strength Measurements ii. Using SNR Measurements iii. Using BER Measurements (1) BER and Signal Strength (2) BER and SNR IV.3.b. Calculate Power Control Update Using Measurements of a Signal Transmitted by another Transceiver IV.4. Transceiver Power Control IV.4.a. Integration Power Control IV.4.b. Gain Expansion Power Control IV.4.c. Power Control In Combination With Variable Data Rate V. Conclusion

#I. Impulse Radio Basics