Context Information Based Initial Cell Search for Millimeter Wave 5G Cellular Networks

Millimeter wave (mmWave) communication is envisioned as a cornerstone to fulfill the data rate requirements for fifth generation (5G) cellular networks. In mmWave communication, beamforming is considered as a key technology to combat the high path-loss, and unlike in conventional microwave communication, beamforming may be necessary even during initial access/cell search. Among the proposed beamforming schemes for initial cell search, analog beamforming is a power efficient approach but suffers from its inherent search delay during initial access. In this work, we argue that analog beamforming can still be a viable choice when context information about mmWave base stations (BS) is available at the mobile station (MS). We then study how the performance of analog beamforming degrades in case of angular errors in the available context information. Finally, we present an analog beamforming receiver architecture that uses multiple arrays of Phase Shifters and a single RF chain to combat the effect of angular errors, showing that it can achieve the same performance as hybrid beamforming

The Anxious Musician: Coping Strategies Used to Combat Music Performance Anxiety

Music Performance Anxiety, or MPA, affects over 20% of musicians, regardless of age, experience, or nationality. MPA is a form of social anxiety that causes the performer great distress before and during a performance experience, often causing the performance to have a less favorable outcome. As this is such a common occurrence in the field of music, it is important for teachers and students alike to understand the basis of anxiety as well as how to deal with its effects. Unfortunately, there is no simple solution to conquer anxiety, but through the implementation of various coping strategies, musicians can have greater success and more enjoyable performance experiences

The Effect of the Bulk Sales Article on Existing Commercial Practices

Power control is considered as an important means to combat near-far fading effects and maintain acceptable connections in wireless communications systems. When applying power control in practice, the performance is restricted by a number of fundamental limitations. Here, these are addressed from a control theory perspective. Limited update rate, limited feedback bandwidth, time delays, measurement errors, feedback errors, and filtering effects among other aspects all affect the resulting performance, and are related to radio channnel characteristics. Simulations further illustrate the hampering effects

Convolutional code performance in planetary entry channels

The planetary entry channel is modeled for communication purposes representing turbulent atmospheric scattering effects. The performance of short and long constraint length convolutional codes is investigated in conjunction with coherent BPSK modulation and Viterbi maximum likelihood decoding. Algorithms for sequential decoding are studied in terms of computation and/or storage requirements as a function of the fading channel parameters. The performance of the coded coherent BPSK system is compared with the coded incoherent MFSK system. Results indicate that: some degree of interleaving is required to combat time correlated fading of channel; only modest amounts of interleaving are required to approach performance of memoryless channel; additional propagational results are required on the phase perturbation process; and the incoherent MFSK system is superior when phase tracking errors are considered

Preliminary performance estimates of an oblique, all-wing, remotely piloted vehicle for air-to-air combat

A computerized aircraft synthesis program has been used to assess the effects of various vehicle and mission parameters on the performance of an oblique, all-wing, remotely piloted vehicle (RPV) for the highly maneuverable, air-to-air combat role. The study mission consists of an outbound cruise, an acceleration phase, a series of subsonic and supersonic turns, and a return cruise. The results are presented in terms of both the required vehicle weight to accomplish this mission and the combat effectiveness as measured by turning and acceleration capability. This report describes the synthesis program, the mission, the vehicle, and results from sensitivity studies. An optimization process has been used to establish the nominal RPV configuration of the oblique, all-wing concept for the specified mission. In comparison to a previously studied conventional wing-body canard design for the same mission, this oblique, all-wing nominal vehicle is lighter in weight and has higher performance

'As a matter of fact I've just about had enough'; : battle weariness and the 2nd New Zealand division during the Italian campaign, 1943-45 : a thesis presented in partial fulfilment of the requirements for the degree of Master of Arts in History at Massey University, Palmerston North, New Zealand

By the time that the 2nd New Zealand Division reached Italy in late 1943, many of the soldiers within it had been overseas since early 1941. Most had fought across North Africa during 1942/43 – some had even seen combat earlier, in Greece and Crete in 1941. The strain of combat was beginning to show, a fact recognised by the division’s commanding officer, Lieutenant-General Bernard Freyberg. Freyberg used the term ‘battle weary’ to describe both the division and the men within it on a number of occasions throughout 1944, suggesting at one stage the New Zealanders be withdrawn from operations completely. This study examines key factors that drove battle weariness within the division: issues around manpower, the operational difficulties faced by the division in Italy, the skill and tenacity of their German opponent, and the realities of modern combat. Critical to understanding the links between these factors and the weariness that manifested itself within the division are the words of the participating soldiers themselves. Three key outcomes of battle weariness are examined in some detail. Exposure to long periods of combat meant that a large number of the New Zealanders were at risk of becoming psychological casualties. Indeed, casualties diagnosed and recorded as exhaustion and neurosis, consistently reached over 20% of those wounded during the period in Italy. Declining morale became an issue for the leadership of 2nd New Zealand Division. Internal censorship of outgoing letters within the division was summarised at the time and these summaries provide an insight into a widespread gloomy outlook that featured throughout 1944. Not only did the letter writers reflect on the poor conditions they faced in Italy, but news from home appears as a significant driver of frontline morale. Lack of discipline – both in and out of the line – caused real concern to senior officers, and at times reached levels that appear to have become institutionalised. Three topics are explored: looting, the use of alcohol, and cases of combat refusal. This work then examines how the underlying issues driving weariness were addressed through the restructuring of the division, the replacement of long serving men, the use of new technologies, and a period of relief out of the line with an extensive training programme. Finally, the division’s performance during the final offensive in Italy in April 1945, is examined, to gauge the success of the changes made

The UK economy [October 2006]

Across the globe world economic growth remains relatively strong despite a slight slowing in the US. Inflationary pressures are more clearly seen as a threat to prices as energy costs continue to grow. The general trend is for a tightening of monetary policy to combat inflation. The performance of the US, Japanese and Chinese economies have all stimulated world demand and trade. The Euro Area is forecast to pick up significantly as activity strengthens there. The only real concern there is the growth of German consumption. Emerging markets and other Far East economies also continue to perform well