TH-PPM UWB over Indoor Fading Channels

Today in the field of data communication,the demand for high transmission rate and diversified business is on the rise, while the spectrum resources are increasingly scarce, transmitting power is also limited. The contradiction between resources and demand is increasingly evident. Ultra-Wideband (UWB) communication systems employ ultra-short impulses to transmit information which spreads the signal energy over a very wide frequency spectrum of several GHz. It has become a hot topic in data communication, and plays a more and more important role in the field of Wireless Local Area Network (WLAN) and Wireless Personal Area Network(WPAN).In this paper, the theory of Ultra wide band wireless communication technologies is introduced. At the beginning of the paper, it studies UWB pulse waveform and modulation technologies, spread spectrum communication technology that UWB employed is also introduced. General indoor channel models (Δ? Kmodel,S-V model and the indoor channel models of IEEE 802...更多.15.3a proposal etc.) are studied, a suitable indoor channel model are proposed for the error performance and capacity analysis of TH-PPM UWB system. The error probability and capacity of TH-PPM (Time-Hopping pulse position modulation) UWB system are investigated. We consider PPM over additive white Gaussian channels for a single-user system. A multiuser environment with PPM is also investigated. The simulation analysis for TH-PPM UWB system over indoor fading channels is considered. At the last part of the paper, how to improve the performance and capacity is discussed. We consider two approaches ,one is the improvement on pulse position modulation. bi-orthogonal PPM and Non-orthogonal PPM over AWGN channel is investigated; the other way is about Rake receiver. The model of Rake receiver is introduced.

Chengdu Superxon technology

I have nearly four years' engineering technician working experience. I’m familiar with manufacture process, good at product line maintenance and be able to solve Lacoste POLO Shirts line issues well. I can improve manufacture process form the issues, supply technical guide to manufacturing workers. I have good communication skill and management ability, good at Lacoste Polo Shirts and written English and respond well in high pressure atmosphere.
Chengdu Superxon technology Ltd. is a private enterprise producing optical transceiver. My position is process engineering technician. My main job is solve the manufacture line issue, do produce line maintenance. Establish tuning and test work station, do equipment period maintanence and calibration. Supply technical guild to MFG operator and repairer. Help Ralph Lauren Polo shirts engineer collect test data, do reject units analysis, report manufacture situation to manage team. I also need to run after the new products pilot manufacture, collect data for PMR (pilot manufacture report) report and send the report to manage-team.

General

1>Assist General Manager to manage daily operation; 2>Responsible for cheap straighteners contact, maintain relationship with key custmers and government departments, collect latest policies to assure the company enjoy favorable chi pink dazzle and run legally; 3>Cashier, report to General Manager, including: Monthly cost breakdown, Monthly revenue calculation, Monthly budget and Monthly report etc.; 4>Familiar with Labor laws, responsible for chi hair straightener management, including: recruitment, C & B management, company inner rules' establishment and completion; 5>Responsible for administration and purchase.
1>Assist Operational Manager to establish a foreign company, familiar with laws & policies related to foreign company establishment; 2>Assist operational manager (OM)to keep the whole company run well; 3>Cashier; 4>Draw up and execute internal management rules; 5>Assure office supplies and responsible for purchasing; 6>Customer receiption; 7>HR: recruitment, new employee training, file employee documents, buy social insurance and housing fund for employees,make salary sheet; 8>Coordinate internal departments of company and organize team-building activities.

managing

■ Be responsible for developing international market, and managing the marketing and sales in the region assigned; ■ Be responsible for the authentication, marketing programme, and public relations of company products, and establishment of the local specialists network ; ■ Be responsible for promoting the application of the technology, establishing cooperation treatment center, technolog training and academic exchange; ■ Be responsible for brands management and operation; ■ Be responsible for nike running shoes service and technology support for company’s products ■ Be in charge of the overall management of the international department and Representative Office in nike trainers.Achievements:■ Accomplished the clinical trail and authentication for company’s treating device and technology in Veitnam within a short period of 1.5 years, established 3 treatment centers and technology training centers by cooperated with three of the biggest local public hospitals, and set up a network of distributors and specialists. ■ Developed customers from 64 provinces and reached the annual sales target of 500,000 USD. ■ Developed the market in neignboring south-east asia countries, established a technology cooperation center in Laos, and developed customers in Thailand, Malaysia and Pakistan. ■ Hold a post of cheap nike shoes of China business association in Vietnam, was responsible for the memberships, planed and organized exchanging seminars, replied to the questions from members and ventures that intened to enter into Vietnam market, and provided them with information share platform.

Shanghai Gammastar Medical Group

■ To obtain the sales target assign; ■ to collect and analyze the market information of medical field, and to manage the marketing and sales of the region assigned(including Vietnam, north face jackets, Laos and Cambodia); ■ to set up the Representative office in Vietnam and establish a strong team; ■ to develop and implement the effective marketing and promotion programmes to achieve the highest markeing visibility and sales performance for the cheap north face jackets brands, and to supervise the authentication of company products and other jobs required by the marketing programs; ■ to establish and manage the local network of distributors and customers. ■ be in charge of the overall management of the Representative office; ■ to set up a management network for the contracted projects and be in charge of the overall management.Achievements:■ Contracted 3 projects ( whole investment projects and partial investment projects) with total amount of 12 millim spyder jackets; ■ Achieved 7 MOU and followed up the approvals of the projects. ■ Implemented the preparatory work of Joint venture for the contracted projects, including obtaining the investment license and finishing the contrustion of the machine room; ■ Developed customers of 64 provinces and established a network of distributors and customers; ■ Made the company brand well-known by the marketing programmes of exhibition, meetings, seminar, etc. ■ Established long term cooperation relations with Vietnam MOH, professional associations and specialists.

design

(1)Customer service dept. training program establishment and improvement,train new stuff to make sure they are capable of fitting their position within 3 months.(2)Improve working procedure in order to improve operational efficiency,Internal service and external service strategy design and execution(3)Make schedule,performance evaluation，personnel transfer within the department (4)Financial Budget of Customer service dept.Data statistics and analysis.Present form(5)Internal communication within Customer Service Dept.production Dept. ,Quality assurance Dept.,north face jackets.,Shipping Dept.(6)Meeting translation job within the company(7)Inform client of Internal remakes about shipping delay,external remakes record and analysis(8)Improve client history system,client feedback system,internal communication system(9)Provide high level with Dept. status report every weekExternal:(1)US marketing team communication,provide service for client from Denmark,England,Israel, meanwile get client information and update production status (2)Customers return visit，inculding festival greetings and feedback regarding quality and service(3)Collect and understand the various competitors in the industry as well as the market dynamics(4)To coordinate with administration dept., Production line,shipping Dept. and US marketing team to play a "bridge function" role(5)Client reception and external negotiation if needed(6)Provide client service and assist technical dept. to provide client with technical service(7)Assist purchasing dept. to purchase materials from cheap north face jackets:(1)Through everyone's effort,reasonable working procedure was established and improved constantly ,operational efficiency has been improved,wokring time has been reduced, human resource has been fully used.(2)A lot of system holes have been fixed to accommodate production procedure and Billing system.(3)Internal communication was highly improved,delayed order and internal remakes that caused by northface jackets were highly reduced(4)"Customer comes first" production,service procedure was basically established, Customer satisfaction and quantity improved