#Ijsrd Performance of Multiple symbol representation with clipping scheme for PAPR reduction in OFDM systems

#IJSRD 

Performance of Multiple symbol representation with clipping scheme for PAPR reduction in OFDM systems

Abstract :

OFDM is one of the multicarrier modulation technique used in various communication systems. The major problem one faces while implementing this system is the high peak to average power .For an efficient OFDM system this PAPR should be low. In this paper a hybrid PAPR (peak to average power ratio) reduction technique for the OFDM (orthogonal frequency division multiplexing) signal which combines a multiple symbol representations method with a signal clipping method is proposed. In multiple symbol representations alternative signaling points are used to represent one symbol and PAPR is further reduced with the clipping scheme. The performance of the hybrid scheme is compared with the partial transmit sequence which is one of the other PAPR reduction scheme. In partial transmit sequence the input data is divided in to disjoint blocks transformed in to time domain sequence and rotated by phase factors. Theoretical analysis and simulation results validate that the proposed scheme has the ability to provide large PAPR reduction, low bit error rate. Performance analysis is also done with the partial transmit sequence scheme.

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#IJSRD Simplified Ipad Ordering System For Hotels

Simplified Ipad Ordering System For Hotels

Abstract :

Simplified Ipad Ordering System for Hotels is an IPad application based project. It will give restaurant customers access to menus of food items organized in categories. Customer will have quick access to menus of food and other items with simple navigation, up or down swipes to vertically scroll through food and other items. This application can be used in two ways. Customer also can access to the ipad or else the hotel waiter can serve over several tables with a single ipad. Once the order is done, the push message will be sent to the kitchen POS (point of sales). A push notification will be appear in the monitor available in the kitchen. The push message contains table no, list of item with needed ingredients. Customer can order multiple numbers of items with their choices. The ordered items contains item id, item quantity, table no, date & time and device id. It can overcome the human error while taking the order. The application have search bar option which helps the customer to search and select the items. Search bar makes easy of access to the needed items fast. Customers also can add the several items to their favorite block. Even feedback, like, unlike, email and printing options are available.

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