The application of ultrawideband technology in future wireless communications and practical exploration

Abstract

An innovative form of wireless communication technology is called ultra-wideband technology. By directly modulating impulse pulses with extremely rapid rise and fall times, it is possible to create signals with bandwidths of the order of GHz. It has the benefits of being insensitive to channel fading, low power spectral density of the transmitted signal, low interception capability, low system complexity, and the ability to provide several centimeters of positioning accuracy. It also resolves the main propagation issues that have plagued traditional wireless technology for many years. Early high-speed data transmission in close proximity utilised ultra-wideband; more recently, foreign nations have started using its sub-nanosecond ultra-narrow pulse for close-range indoor positioning. Traditional wireless communication modulates signals to various frequency bands using various carrier frequencies, and within a given range, the carrier wave's frequency and power will change. Ultra-wideband wireless communication does not require a carrier wave, but uses pulsed signals to transmit information, where pulsed signals are those that are generated and disappear in a very short time, from a few hundred microseconds to less than a few nanoseconds. Thirdly, it can be positioned with high accuracy and has good resistance to multipath effects in timing. Ultra-wideband technology wireless communication systems generally work at sub-nanosecond pulse widths, and thus have sub-nanosecond time resolution, and its multipath resolution is correspondingly less than 30 cm, the signal will be received in the formation of a 1-nanosecond time reception window, only receive the signal within the reception window, the multipath interference has very good resistance. Fourthly, it has a greater penetration capability. Ultra-wideband pulses have a low frequency, the lowest of any wireless signal with the same absolute bandwidth, so they have greater penetration capability. Fifthly, the structure is simple, and the cost is low. The wireless communication system of ultra wideband technology does not change the traditional carrier wave to realize information transmission. The wireless communication system uses up conversion circuit, down conversion circuit, intermediate frequency circuit and various filters. The system structure is simple, and communication is relatively tolerant and easy. Therefore, the cost of wireless communication using ultra wideband technology is much lower.