Linearity Considerations of W-cdma Front-ends for Umts
نویسندگان
چکیده
The signals used in UMTS have wide bandwidth and high crest factors. Circuit designers use sinusoids to design and simulate their building blocks. Formulas are presented relating the various distortion effects of the W-CDMA signals like adjacent channel leakage ratio (ACLR), cross modulation or intermodulation to well-known linearity measures like input intercept point of third(IIP3) and second-order (IIP2) and compression point. Measurements of amplifiers with sinusoidal and broadband signals confirm the obtained results.
منابع مشابه
SATIN Approach in W-CDMA Adaptation for Broadcast and Multicast Based S-UMTS
This paper will discuss physical layer aspects of the novel approach taken within the SATIN framework to deliver Multicast/Broadcast multimedia services (MBMS) through a satellite network with minimum change to the terrestrial 3G WCDMA air interface. Keywords—SATIN, S-UMTS, Physical layer, UTRA, W-CDMA
متن کاملESA Satellite Wideband CDMA Radio Transmission Technology for the IMT-2000/UMTS Satellite Component: Features & Performance
The recent European Telecommunications Standards Institute (ETSI) decision to endorse for the Universal Telecommunication Radio Access ??? (UTRA) techniques based upon wideband-CDMA approaches for terrestrial UMTS (T-UMTS) paired frequency duplexing band will certainly constitute an important driver to orientate the corresponding choice for the satellite UMTS (S-UMTS) component. In this paper i...
متن کاملITB/Electronics Receiver Front-End Design for WiMAX/LTE in 90 nm CMOS
The development of wireless communication systems into multi-standard radio architectures that can process a multitude of frequency bands and modulation schemes has lead to a growing demand for wideband receiver front-ends. To allow for portability and low cost, these new architectures also need to be low power, compact size integrated circuits with a higher degree of components integrated on c...
متن کاملReceiver Front-end Design for WiMAX/LTE in 90 nm CMOS
The development of wireless communication systems into multi-standard radio architectures that can process a multitude of frequency bands and modulation schemes has lead to a growing demand for wideband receiver front-ends. To allow for portability and low cost, these new architectures also need to be low power, compact size integrated circuits with a higher degree of components integrated on c...
متن کاملThe random early detection concept applied to the W-CDMA UMTS medium access control
In this work we introduce the concept of Random Early Detection (RED) to a medium access control (MAC) protocol applicable to the W-CDMA UMTS access interface. The concept is in general applicable to MAC protocols that use channel load information to regulate the access to a CDMA channel. By making the analogy of a CDMA channel as if it was a queuing system of certain capacity, RED prevents the...
متن کامل